A man weighing 700 N is in an elevator that is accelerating upward at 4 m/s2.The force exerted on him by the elevator floor is:

A) 71 N B) 290 N C) 410 N D) 700 N E) 990 N A) 71 N B) 290 N C) 410 N D) 700 N E) 990 N E

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope.The force of the block on the rope is:

A) 14 N, up B) 14 N, down C) 35 N, up D) 35 N, down E) 49 N, up A) 14 N, up B) 14 N, down C) 35 N, up D) 35 N, down E) 49 N, up

A 1100-kg elevator is rising and its speed is increasing at 3.0 m/s2.The tension in the elevator cable is:

A) 7500 N B) 1100 N C) 3300 N D) 11000 N E) 14000 N A) 7500 N B) 1100 N C) 3300 N D) 11000 N E) 14000 N

A) is slightly different at different places on the Earth B) is a vector C) is independent of the acceleration due to gravity D) is the same for all bodies of the same volume E) can be measured most accurately on a spring scale A) is slightly different at different places on the Earth B) is a vector C) is independent of the acceleration due to gravity D) is the same for all bodies of the same volume E) can be measured most accurately on a spring scale

Exam 5: Force and Motion

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Two forces, one with a magnitude of 3 N and the other with a magnitude of 5 N, are applied to an object.For which orientation of the forces shown in the diagrams is the magnitude of the acceleration of the object the least?

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Question 1

Correct Answer:

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Acceleration is always in the direction:

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Question 2

Correct Answer:

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A man weighing 700 N is in an elevator that is accelerating upward at 4 m/s².The force exerted on him by the elevator floor is:

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Question 3

Correct Answer:

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A short 10-g string is used to pull a 50-g toy across a frictionless horizontal surface.If a 3.0 * 10^-2 N force is applied horizontally to the free end of the string, the force of the string on the toy, at the other end, is:

(Multiple Choice)

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Question 4

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s² by means of a rope.The force of the block on the rope is:

(Multiple Choice)

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Question 5

You stand on a spring scale on the floor of an elevator.Of the following, the scale shows the highest reading when the elevator:

(Multiple Choice)

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Question 6

Two blocks are connected by a massless string that passes over a massless pulley, as shown.In the absence of friction, how does the tension force exerted by the string on the 250 N block compare with the tension force exerted by the string on the 350 N block?

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Question 7

Three books (X, Y, and Z)rest on a table.The weight of each book is indicated.The force of book Z on book Y is:

(Multiple Choice)

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Question 8

A 1100-kg elevator is rising and its speed is increasing at 3.0 m/s².The tension in the elevator cable is:

(Multiple Choice)

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Question 9

The term "mass" refers to the same physical concept as:

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Question 10

A book rests on a table, exerting a downward force on the table.The reaction to this force is:

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Question 11

You stand on a spring scale on the floor of an elevator.Of the following, the scale shows the highest reading when the elevator:

(Multiple Choice)

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Question 12

A crate rests on a horizontal surface and a woman pulls on it with a 10-N force.Rank the situations shown below according to the magnitude of the normal force exerted by the surface on the crate, least to greatest.

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Question 13

An example of an inertial reference frame is:

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Question 14

A motionless 400-N steel ball is suspended by a light rope from the ceiling.The tension in the rope is:

(Multiple Choice)

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Question 15

The mass of a body:

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Question 16

When a 40-N force, parallel to the incline and directed up the incline, is applied to a crate on a frictionless incline that is 30° above the horizontal, the acceleration of the crate is 2.0 m/s², up the incline.The mass of the crate is:

(Multiple Choice)

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Question 17

The mass and weight of a body:

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Question 18

Which of the following quantities is NOT a vector?

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Question 19

An object rests on a horizontal frictionless surface.A net horizontal force of magnitude F is applied.This force produces an acceleration:

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Question 20

Showing 1 - 20 of 73

Exam 5: Force and Motion

Two forces, one with a magnitude of 3 N and the other with a magnitude of 5 N, are applied to an object.For which orientation of the forces shown in the diagrams is the magnitude of the acceleration of the object the least?

Acceleration is always in the direction:

A man weighing 700 N is in an elevator that is accelerating upward at 4 m/s2.The force exerted on him by the elevator floor is:

A short 10-g string is used to pull a 50-g toy across a frictionless horizontal surface.If a 3.0 * 10-2 N force is applied horizontally to the free end of the string, the force of the string on the toy, at the other end, is:

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope.The force of the block on the rope is:

You stand on a spring scale on the floor of an elevator.Of the following, the scale shows the highest reading when the elevator:

Two blocks are connected by a massless string that passes over a massless pulley, as shown.In the absence of friction, how does the tension force exerted by the string on the 250 N block compare with the tension force exerted by the string on the 350 N block?

Three books (X, Y, and Z)rest on a table.The weight of each book is indicated.The force of book Z on book Y is:

A 1100-kg elevator is rising and its speed is increasing at 3.0 m/s2.The tension in the elevator cable is:

The term "mass" refers to the same physical concept as:

A book rests on a table, exerting a downward force on the table.The reaction to this force is:

You stand on a spring scale on the floor of an elevator.Of the following, the scale shows the highest reading when the elevator:

A crate rests on a horizontal surface and a woman pulls on it with a 10-N force.Rank the situations shown below according to the magnitude of the normal force exerted by the surface on the crate, least to greatest.

An example of an inertial reference frame is:

A motionless 400-N steel ball is suspended by a light rope from the ceiling.The tension in the rope is:

The mass of a body:

When a 40-N force, parallel to the incline and directed up the incline, is applied to a crate on a frictionless incline that is 30° above the horizontal, the acceleration of the crate is 2.0 m/s2, up the incline.The mass of the crate is:

The mass and weight of a body:

Which of the following quantities is NOT a vector?

An object rests on a horizontal frictionless surface.A net horizontal force of magnitude F is applied.This force produces an acceleration:

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A man weighing 700 N is in an elevator that is accelerating upward at 4 m/s².The force exerted on him by the elevator floor is:

A short 10-g string is used to pull a 50-g toy across a frictionless horizontal surface.If a 3.0 * 10^-2 N force is applied horizontally to the free end of the string, the force of the string on the toy, at the other end, is:

A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s² by means of a rope.The force of the block on the rope is:

A 1100-kg elevator is rising and its speed is increasing at 3.0 m/s².The tension in the elevator cable is:

When a 40-N force, parallel to the incline and directed up the incline, is applied to a crate on a frictionless incline that is 30° above the horizontal, the acceleration of the crate is 2.0 m/s², up the incline.The mass of the crate is: