1. Sam is sliding down a rope from his third floor window to meet his friend Andy. As he slides down the rope faster and faster, he becomes frightened and grabs harder on the rope, increasing the tension in the rope. As soon as the upward tension in the rope becomes equal to his weight:

Group of answer choices

the rope must break.

Sam will slow down.

Sam will stop.

Sam will continue down at a constant velocity.

2.

What's the difference between mass and weight?

Group of answer choices

Mass is a measure of an object's inertia, whereas weight is a measure of how hard the earth is pulling on an object.

none of the other answers is correct

Weight is a characteristic of an object, whereas mass is a characteristic of the motion of an object.

There is no difference. They represent two different terms for the same thing.

Mass pertains to solids only, whereas, weight pertains to all phases of matter.

3. A train consists of a caboose (mass = 1000 kg), a car (mass = 2000 kg), and an engine car (mass = 2000 kg). If the train has an acceleration of 5.0 m/s2, then the tension force in the coupling between the middle car and the engine car, assuming no friction is involved, is:

Group of answer choices

15,000 N

25,000 N

20,000 N

10,000 N

4. You stand on a bathroom scale in an elevator accelerating upwards and it reads 200 Newtons. Which of the following is true?

You weigh more than 200 Newtons.

You weigh less than 200 Newtons.

One needs to know the actual value of the acceleration to answer any question about the weight.

You weigh 200 Newtons.

5.

Two identical masses are attached by a light string that passes over a small pulley, as shown. The table and the pulley are frictionless. The system is moving:

Group of answer choices

with an acceleration larger than g.

with an acceleration less than g.

at constant speed.

with an acceleration equal to g

6.A packing crate slides down an inclined ramp at constant velocity. Thus we can deduce that:

Group of answer choices

a frictional force is acting on it.

gravity is not acting on it

a net force is acting on it.

it may be accelerating.

7.A toolbox, of mass M, is resting on a flat board. One end of the board is lifted up until the toolbox just starts to slide. The angle that the board makes with the horizontal for this to occur depends on:

Group of answer choices

thecoefficient of static friction,.

the normal reaction.

the mass M.

all of the above.

8. A car experiences both a centripetal and a tangential acceleration. For which of the following would this be true?

Group of answer choices

A car going around a curve and slowing down.

A car going around a curve at constant speed.

A car going along a straight road and decreasing its speed.

A car going along a straight road and increasing its speed.

A car going along a straight road at constant speed.

9.

The terminal speed if a skydiver falling through air,

Group of answer choices

depends on the density of the air.

depends on her body orientation.

depends on her mass.

depends on the local value of the acceleration due to gravity.

all other answers are correct

10.

A student is sitting on the right side of a school bus when it makes a right turn. We know that the force of gravity acts downwards and a normal force from the seat acts upwards. If the student stays in place when the bus turns, we also know that there must be

Group of answer choices

a force parallel to the seat directed to the right on the student.

a force parallel to the seat directed forward on the student.

no other force on the student.

a force parallel to the seat directed to the left on the student.