A 4 500-N weight is suspended in equilibrium by two cables.Cable 1 applies a horizontal force to the right of the object and has a tension,T1.Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x-axis and has a tension,T2.Find T2.

A) 6.0E+3 N B) 2.7E+3 N C) 7.5E+3 N D) 5.6E+3 N E) 3.6E+3 N A) 6.0E+3 N B) 2.7E+3 N C) 7.5E+3 N D) 5.6E+3 N E) 3.6E+3 N

Two forces act on a 8.50-kg object.One of the forces is 14.0 N.If the object accelerates at 3.50 m/s2,what is the greatest possible magnitude of the other force?

A) 1.0 N B) 15.8 N C) 43.8 N D) 26.3 N E) 73.5 N A) 1.0 N B) 15.8 N C) 43.8 N D) 26.3 N E) 73.5 N

Exam 4: Newtons Laws of Motion

Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another.The cubes are lined up from left to right and a force is applied to the left side of the left cube causing all three cubes to accelerate to the right at 3.0 m/s².What is the magnitude of the force exerted on the middle cube by the left cube in this case?

(Multiple Choice)

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Question 81

A worker pulls a 350-N packing crate at constant velocity across a rough floor by exerting a force F = 200.0 N at an angle of 30.0° above the horizontal.What is the coefficient of kinetic friction of the floor?

(Multiple Choice)

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Question 82

A crate of weight w is being pushed across a horizontal surface by a force directed at an angle of 20° below the horizontal.What is the magnitude of the normal force on the crate?

(Multiple Choice)

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Question 83

A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5° grade.If the track is considered to be frictionless,what speed does the boxcar have after 10 seconds?

(Multiple Choice)

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Question 84

A 4 500-N weight is suspended in equilibrium by two cables.Cable 1 applies a horizontal force to the right of the object and has a tension,T₁.Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x-axis and has a tension,T₂.Find T_2.

(Multiple Choice)

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Question 85

The maximum possible value for the coefficient of static friction is:

(Multiple Choice)

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Question 86

Rita accelerates a 0.50-kg ball from rest to 8.0 m/s during the 0.14 s in which her foot is in contact with the ball.What average force does she apply to the ball during the kick?

(Multiple Choice)

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Question 87

Hector drives a pickup truck horizontally at 9.00 m/s.He is transporting a crate of delicate lead crystal.If the coefficient of static friction between the crate and the truck bed is 0.740,what is the minimum stopping distance for the truck so the crate will not slide?

(Multiple Choice)

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Question 88

The coefficient of friction between a racecar's wheels and the track is 1.0.The car starts from rest and accelerates at a constant rate for 275 m.Find the maximum speed at the end of the race.

(Multiple Choice)

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Question 89

A 500-N tightrope walker stands at the center of the rope.If the rope can withstand a tension of 1 800 N without breaking,what is the minimum angle the rope can make with the horizontal?

(Multiple Choice)

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Question 90

A sled is on a horizontal surface and a rope with tension T is pulling on it at an angle θ above the horizontal.The sled had mass M and does not move due to the frictional force.In this case the coefficient of friction is μ_s.In terms of the variables given and g,what is the magnitude of the frictional force in this case?

(Multiple Choice)

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Question 91

If we know that a nonzero net force is acting on an object,which of the following must we assume regarding the object's condition? The object is:

(Multiple Choice)

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Question 92

The net force on an object is in the positive x-direction.Consider the following statements. (I)The object can be moving in the negative x-direction. (II)The object can be speeding up. (III)The object can be slowing down. (IV)The object can be moving in the positive y-direction. Which of the statements are true?

(Multiple Choice)

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Question 93

A 2 000-kg sailboat experiences an eastward force of 4 500 N by the ocean tide and a wind force against its sails with magnitude of 1 500 N directed toward the northwest (45° N of W).What is the direction of the resultant acceleration?

(Multiple Choice)

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Question 94

As a basketball player starts to jump for a rebound,he begins to move upward faster and faster until he leaves the floor.During this time that he is in contact with the floor,the force of the floor on his shoes is:

(Multiple Choice)

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Question 95

A block is launched up an incline plane.After going up the plane,it slides back down to its starting position.The coefficient of friction between the block and the plane is 0.3.The speed of the block when it reaches the starting position on the trip down:

(Multiple Choice)

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Question 96

As a car moves forward on a level road at constant velocity,the net force acting on the tires is:

(Multiple Choice)

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Question 97

A 3.0-kg bowling ball experiences a net force of 8.0 N.What will be its acceleration?

(Multiple Choice)

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Question 98

A thrown stone hits a window,but doesn't break it.Instead it reverses direction and ends up on the ground below the window.In this case,we know:

(Multiple Choice)

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Question 99

Two forces act on a 8.50-kg object.One of the forces is 14.0 N.If the object accelerates at 3.50 m/s²,what is the greatest possible magnitude of the other force?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 101

Exam 4: Newtons Laws of Motion

A worker pulls a 350-N packing crate at constant velocity across a rough floor by exerting a force F = 200.0 N at an angle of 30.0° above the horizontal.What is the coefficient of kinetic friction of the floor?

A crate of weight w is being pushed across a horizontal surface by a force directed at an angle of 20° below the horizontal.What is the magnitude of the normal force on the crate?

A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5° grade.If the track is considered to be frictionless,what speed does the boxcar have after 10 seconds?

A 4 500-N weight is suspended in equilibrium by two cables.Cable 1 applies a horizontal force to the right of the object and has a tension,T1.Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x-axis and has a tension,T2.Find T2.

The maximum possible value for the coefficient of static friction is:

Rita accelerates a 0.50-kg ball from rest to 8.0 m/s during the 0.14 s in which her foot is in contact with the ball.What average force does she apply to the ball during the kick?

Hector drives a pickup truck horizontally at 9.00 m/s.He is transporting a crate of delicate lead crystal.If the coefficient of static friction between the crate and the truck bed is 0.740,what is the minimum stopping distance for the truck so the crate will not slide?

The coefficient of friction between a racecar's wheels and the track is 1.0.The car starts from rest and accelerates at a constant rate for 275 m.Find the maximum speed at the end of the race.

A 500-N tightrope walker stands at the center of the rope.If the rope can withstand a tension of 1 800 N without breaking,what is the minimum angle the rope can make with the horizontal?

If we know that a nonzero net force is acting on an object,which of the following must we assume regarding the object's condition? The object is:

A 2 000-kg sailboat experiences an eastward force of 4 500 N by the ocean tide and a wind force against its sails with magnitude of 1 500 N directed toward the northwest (45° N of W).What is the direction of the resultant acceleration?

As a basketball player starts to jump for a rebound,he begins to move upward faster and faster until he leaves the floor.During this time that he is in contact with the floor,the force of the floor on his shoes is:

A block is launched up an incline plane.After going up the plane,it slides back down to its starting position.The coefficient of friction between the block and the plane is 0.3.The speed of the block when it reaches the starting position on the trip down:

As a car moves forward on a level road at constant velocity,the net force acting on the tires is:

A 3.0-kg bowling ball experiences a net force of 8.0 N.What will be its acceleration?

A thrown stone hits a window,but doesn't break it.Instead it reverses direction and ends up on the ground below the window.In this case,we know:

Two forces act on a 8.50-kg object.One of the forces is 14.0 N.If the object accelerates at 3.50 m/s2,what is the greatest possible magnitude of the other force?

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A 4 500-N weight is suspended in equilibrium by two cables.Cable 1 applies a horizontal force to the right of the object and has a tension,T₁.Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x-axis and has a tension,T₂.Find T_2.

Two forces act on a 8.50-kg object.One of the forces is 14.0 N.If the object accelerates at 3.50 m/s²,what is the greatest possible magnitude of the other force?