How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28S1U1P1$\circ$S1S1P0 incline plane?

A) 2.93 m B) 0.98 m C) 1.96 m D) 0.46 m E) 0.86 m A) 2.93 m B) 0.98 m C) 1.96 m D) 0.46 m E) 0.86 m

Two masses,m1 = 10,000 kg and m2 = 300,000 kg,in space exert forces on each other.What is a2,the acceleration of m2? The force on m1 due to m2,F,is 900,000 N and is in the positive x-direction.

A) 90 m/s2 B) 3 m/s2 C) 900 m/s2 D) -3 m/s2 E) -90 m/s2 A) 90 m/s2 B) 3 m/s2 C) 900 m/s2 D) -3 m/s2 E) -90 m/s2

Two masses,M1 and M2 hang over a frictionless pulley by means of a massless string.They are perfectly balanced when a flea of mass m is standing on M2.When the flea hops from one mass to the other,the system acquires an acceleration,a.What is the value of a in terms of the three masses?

A) a=g(m/(M1+M2)) B) a=g(m/2M1) C) a=g(m/M1) D) a=g(m/M2) A) a=g(m/(M1+M2)) B) a=g(m/2M1) C) a=g(m/M1) D) a=g(m/M2)

You are riding an elevator that is moving upward with 3 m/s and slowing down at 2 m/s2.Your real weight is 490 N.Your apparent weight is

A) 390 N. B) 490 N. C) 680 N. D) 980 N. A) 390 N. B) 490 N. C) 680 N. D) 980 N.

Force vector A has a length of 5 N and an angle of 30S1U1P1$\circ$S1S1P0 with respect to the positive x-axis.Force vector B has a length of 5 N and an angle of 150S1U1P1$\circ$S1S1P0 with respect to the positive x-axis.What is the magnitude of the third force vector which must be added to A and B in order to make the net force equal to zero? (All three forces act on the same object).

A) -10 N B) -5 N C) 0 D) 5 N E) 10 N A) -10 N B) -5 N C) 0 D) 5 N E) 10 N

A 75-kg man rides an elevator which is accelerating upward with a uniform acceleration of 1.4 m/s2.What is the maximum force of static friction if the coefficient of friction between him and the floor is 0.42?

A) 260 N B) 310 N C) 350 N D) 840 N A) 260 N B) 310 N C) 350 N D) 840 N

A wooden crate is at rest on a wooden ramp.(µs = 0.50;µk = 0.20;g = 9.8 m/s2).Find the angle $\theta$ of the ramp for which the crate will start sliding down the ramp.

A) 26.6S1U1P1$\circ$S1S1P0 B) 63.4S1U1P1$\circ$S1S1P0 C) 32.6S1U1P1$\circ$S1S1P0 D) 57.4S1U1P1$\circ$S1S1P0 E) 45.0S1U1P1$\circ$S1S1P0 A) 26.6S1U1P1$\circ$S1S1P0 B) 63.4S1U1P1$\circ$S1S1P0 C) 32.6S1U1P1$\circ$S1S1P0 D) 57.4S1U1P1$\circ$S1S1P0 E) 45.0S1U1P1$\circ$S1S1P0

Exam 4: Force | Examlex

An object with mass m is hanging from a wire attached to the ceiling of an elevator.The elevator is moving downward and its speed is increasing at rate of a = 5 m/s².Which one of the following statements is true?

(Multiple Choice)

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Question 61

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28^$\circ$ incline plane?

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Question 62

A girl of mass 35 kg and boy of mass 25 kg are connected by a light rope.They move horizontally in a skating rink.A second rope is attached to the girl and with this second rope,she is pulled by a force of 300 N.The magnitude of their acceleration is

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Question 63

A block of mass 0.50 kg is on a table and attached to a block of mass 0.25 kg by a taut,massless string.The 0.25-kg block hangs by means of the string,which goes over a pulley.The 0.25-kg block is released,and it descends from rest at a constant acceleration,travelling 1.00 m in 1.25 s.What is the coefficient of kinetic friction between the table and the 0.50-kg block?

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Question 64

Two objects are not in contact,but they affect each other via gravity,and there are no other forces acting on either object.Which statement is always true?

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Question 65

There are only two forces on an object that has a mass of 10.0 kg.Both forces have a magnitude of 10.0 N.The angle between the forces is 60.0 degrees.What is the magnitude of the object's acceleration?

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Question 66

Which of the relations is correct for the hanging sign of mass M.

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Question 67

A person with a mass of 100 kg is going down in an elevator with a constant velocity of -9.8 m/s.Which of the following is true (chose one).

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Question 68

Two masses,m₁ = 10,000 kg and m₂ = 300,000 kg,in space exert forces on each other.What is a₂,the acceleration of m₂? The force on m₁ due to m₂,F,is 900,000 N and is in the positive x-direction.

(Multiple Choice)

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Question 69

Two masses,M₁ and M₂ hang over a frictionless pulley by means of a massless string.They are perfectly balanced when a flea of mass m is standing on M₂.When the flea hops from one mass to the other,the system acquires an acceleration,a.What is the value of a in terms of the three masses?

(Multiple Choice)

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Question 70

You are riding an elevator that is moving upward with 3 m/s and slowing down at 2 m/s².Your real weight is 490 N.Your apparent weight is

(Multiple Choice)

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Question 71

The direction of the normal force is always

(Multiple Choice)

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Question 72

Two forces have magnitude 10 and 15 N and point as shown in the diagram.What is the magnitude of a third force which would exactly balance these two forces? That is,make the sum of the three forces zero.

(Multiple Choice)

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Question 73

Force vector A has a length of 5 N and an angle of 30^$\circ$ with respect to the positive x-axis.Force vector B has a length of 5 N and an angle of 150^$\circ$ with respect to the positive x-axis.What is the magnitude of the third force vector which must be added to A and B in order to make the net force equal to zero? (All three forces act on the same object).

(Multiple Choice)

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Question 74

A climber pulls on a rope that goes through a single pulley directly above him and then comes back down to an attachment point on his belt.The climber has a mass of 65 kg.The force with which the climber must pull on the rope in order to support himself on the rope is

(Multiple Choice)

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Question 75

As shown in the figure,a person standing on the floor pulls on a rope with a force F at an angle of (with respect to the positive x axis)in order to raise a weight with pulleys.It is raised at a constant velocity.Consider the rope as massless and the pulleys as frictionless.(The mass hanging from the lower pulley does not interfere with the movement of the pulley.)If the maximum tension the rope can withstand without is 100 N,what is the largest weight this pulley system can lift (within 5% accuracy)?

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Question 76

A 75-kg man rides an elevator which is accelerating upward with a uniform acceleration of 1.4 m/s².What is the maximum force of static friction if the coefficient of friction between him and the floor is 0.42?

(Multiple Choice)

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Question 77

A 2.29-kg mass is suspended from a string which is pulled upward.The mass accelerates upwards with an acceleration of 2.30 m/s².What is the tension in the string? (in N)

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Question 78

A descending elevator is subject to a constant rate of acceleration,dropping 50.0 m as it goes from an initial velocity of 15.0 m/s downward,to rest.As a percentage of the occupants' masses,what is their apparent weight?

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Question 79

A wooden crate is at rest on a wooden ramp.(µ_s = 0.50;µ_k = 0.20;g = 9.8 m/s²).Find the angle $\theta$ of the ramp for which the crate will start sliding down the ramp. $A wooden crate is at rest on a wooden ramp.(µs = 0.50;µk = 0.20;g = 9.8 m/s2).Find the angle \theta of the ramp for which the crate will start sliding down the ramp.$

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Question 80

Showing 61 - 80 of 86

Exam 4: Force

An object with mass m is hanging from a wire attached to the ceiling of an elevator.The elevator is moving downward and its speed is increasing at rate of a = 5 m/s2.Which one of the following statements is true?

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28 ∘\circ∘ incline plane?

A girl of mass 35 kg and boy of mass 25 kg are connected by a light rope.They move horizontally in a skating rink.A second rope is attached to the girl and with this second rope,she is pulled by a force of 300 N.The magnitude of their acceleration is

Two objects are not in contact,but they affect each other via gravity,and there are no other forces acting on either object.Which statement is always true?

There are only two forces on an object that has a mass of 10.0 kg.Both forces have a magnitude of 10.0 N.The angle between the forces is 60.0 degrees.What is the magnitude of the object's acceleration?

Which of the relations is correct for the hanging sign of mass M.

A person with a mass of 100 kg is going down in an elevator with a constant velocity of -9.8 m/s.Which of the following is true (chose one).

Two masses,m1 = 10,000 kg and m2 = 300,000 kg,in space exert forces on each other.What is a2,the acceleration of m2? The force on m1 due to m2,F,is 900,000 N and is in the positive x-direction.

Two masses,M1 and M2 hang over a frictionless pulley by means of a massless string.They are perfectly balanced when a flea of mass m is standing on M2.When the flea hops from one mass to the other,the system acquires an acceleration,a.What is the value of a in terms of the three masses?

You are riding an elevator that is moving upward with 3 m/s and slowing down at 2 m/s2.Your real weight is 490 N.Your apparent weight is

The direction of the normal force is always

Two forces have magnitude 10 and 15 N and point as shown in the diagram.What is the magnitude of a third force which would exactly balance these two forces? That is,make the sum of the three forces zero.

A climber pulls on a rope that goes through a single pulley directly above him and then comes back down to an attachment point on his belt.The climber has a mass of 65 kg.The force with which the climber must pull on the rope in order to support himself on the rope is

A 75-kg man rides an elevator which is accelerating upward with a uniform acceleration of 1.4 m/s2.What is the maximum force of static friction if the coefficient of friction between him and the floor is 0.42?

A 2.29-kg mass is suspended from a string which is pulled upward.The mass accelerates upwards with an acceleration of 2.30 m/s2.What is the tension in the string? (in N)

A descending elevator is subject to a constant rate of acceleration,dropping 50.0 m as it goes from an initial velocity of 15.0 m/s downward,to rest.As a percentage of the occupants' masses,what is their apparent weight?

A wooden crate is at rest on a wooden ramp.(µs = 0.50;µk = 0.20;g = 9.8 m/s2).Find the angle θ\thetaθ of the ramp for which the crate will start sliding down the ramp.

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An object with mass m is hanging from a wire attached to the ceiling of an elevator.The elevator is moving downward and its speed is increasing at rate of a = 5 m/s².Which one of the following statements is true?

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28^$\circ$ incline plane?

Two masses,m₁ = 10,000 kg and m₂ = 300,000 kg,in space exert forces on each other.What is a₂,the acceleration of m₂? The force on m₁ due to m₂,F,is 900,000 N and is in the positive x-direction.

Two masses,M₁ and M₂ hang over a frictionless pulley by means of a massless string.They are perfectly balanced when a flea of mass m is standing on M₂.When the flea hops from one mass to the other,the system acquires an acceleration,a.What is the value of a in terms of the three masses?

You are riding an elevator that is moving upward with 3 m/s and slowing down at 2 m/s².Your real weight is 490 N.Your apparent weight is

A 75-kg man rides an elevator which is accelerating upward with a uniform acceleration of 1.4 m/s².What is the maximum force of static friction if the coefficient of friction between him and the floor is 0.42?

A 2.29-kg mass is suspended from a string which is pulled upward.The mass accelerates upwards with an acceleration of 2.30 m/s².What is the tension in the string? (in N)