Free Printable Longtest

1.

Which of the following is the correct SI unit of work?

a)

$kg\cdot m\ s^{-2}$

b)

$kg\cdot m^2s^{-1}$

c)

$kg\cdot m^2s^{-2}$

d)

$kg^2ms^{-2}$

2.

If there is no motion, can work be done on a system?

a)

Yes, if an outside force is provided.

b)

Yes, since motion is only relative.

c)

No, since a system which is not moving has no energy.

d)

No, because of the way work is defined.

3.

the amount of work you do if you push twice as hard against a stationary concrete wall

a)

doubles.

b)

is cut in half.

c)

remains constant but non zero.

d)

remains constant at zero.

4.

How much work is done if you lift a 30N pail (with water) 3.0m vertically and then returned to its original position?

a)

45J

b)

90J

c)

180J

d)

No work was done

5.

On a Force versus position graph, the area under the curve represents

a)

work.

b)

kinetic energy.

c)

power.

d)

potential energy.

6.

the quantity $\frac{1}{2}mv^2$ is

a)

the kinetic energy of the object.

b)

the potential energy of the object.

c)

the work done on the object by the force.

d)

the power supplied to the object by the force.

7.

What is the objects kinetic energy if the net work done on an object is positive?

a)

decreases

b)

remains the same

c)

increases

d)

zero

8.

What is the object's kinetic energy id the net work done on the object is negative?

a)

decreases

b)

remains the same

c)

increases

d)

zero

9.

What is the object's kinetic energy if the net work done on the object is zero?

a)

decreases

b)

remains the same

c)

increases

d)

zero

10.

the quantity $mgy$ is

a)

the kinetic energy of the object.

b)

the gravitaional potential energy of the object

c)

the work done on the object by the force.

d)

the power supplied to the object by the force.

11.

if the car is driving up a hill, describe the energy.

a)

entirely kinetic

b)

entirely potential

c)

both kinetic and potential

d)

gravitational

12.

The quantity $\frac{Fd}{t}$ is

a)

the kinetic energy of the object.

b)

the potential energy of the object.

c)

the work done on the object by the force

d)

the power supplied to the object by the force.

13.

In SI unit, power is expressed in

a)

$kg\ ms^{-2}$

b)

$kg\ m^2s^{-2}$

c)

$kg\ m^2s^{-3}$

d)

$kg^2ms^{-2}$

14.

Which of the following is NOT a unit of power?

a)

watt/second

b)

newton-meter/second

c)

joule/second

d)

watt

15.

What is the SI unit of momentum?

a)

$N\cdot m$

b)

$\frac{N}{s}$

c)

$N\cdot s$

d)

$\frac{N}{m}$

16.

A truck of mass $m$ is moving with a momentum $p$ . How would you represent its kinetic energy in terms of these two quantities?

a)

$\frac{p^2}{2m}$

b)

$\frac{1}{2}mp^2$

c)

$mp$

d)

$\frac{mp}{2}$

17.

In the Force versus time graph, the are under the curve represents

a)

implulse.

b)

momentum.

c)

work.

d)

kinetic energy.

18.

The linear momentum of the two objects that collide and bounce off each other is

a)

definitely conserved.

b)

definitely not conserved.

c)

conserved only if the collision is elastic.

d)

conserved only if the environment is frictionless.

19.

if the momentum is conserved in an elastic collision, which of the following statements is TRUE about kinetic energy?

a)

Kinetic energy is also conserved.

b)

Kinetic energy is gained.

c)

Kinetic energy is lost.

d)

none of the above.

20.

When is the kinetic energy conserved?

a)

In elastic collisions

b)

in inelastic collisions

c)

in any collisions in which the objects do not stick together

d)

in all collisions

21.

If two objects collide and stick together, then the kinetic energy is

a)

definitely conserved.

b)

definitely not conserved.

c)

conserved only if the collision is elastic

d)

conserved only if the environment is frictionless.

22.

If the momentum is conserved in an inelastic collision, then which of the following statements is TRUE about kinetic energy?

a)

Kinetic energy is also conserved.

b)

Kinetic energy is gained.

c)

Kinetic energy is lost.

d)

None of the above

23.

Which object experiences the larger magnitude of momentum change if a small object collides with a large object and sticks?

a)

the large object

b)

the small object

c)

both experience the same magnitude of momentum change

d)

cannot be determined from the information given

24.

Impulse has the same dimensions as

a)

force

b)

power

c)

energy

d)

momentum

25.

A radian is about:

a)

$25\degree$

b)

$37\degree$

c)

$45\degree$

d)

$57\degree$

26.

One revolution is the same as:

a)

$1\ rad$

b)

$57\ rad$

c)

$\frac{\pi}{2}\ rad$

d)

$2\pi\ rad$

27.

One revolution per minute is about:

a)

0.0524 rad/s

b)

0.105 rad/s

c)

0.95 rad/s

d)

1.57 rad/s

28.

Angular displacement is usually express in units of

a)

meters.

b)

radians.

c)

revolutions.

d)

arcs.

29.

Angular velocity is expressed in units of

a)

meters per second.

b)

radians per second.

c)

omegas per second.

d)

arcs per second.

30.

Angular acceleration is expressed in units of

a)

meters per second squared.

b)

radians per second squared.

c)

alphas per second squared.

d)

arcs per second squared.

31.

The quantity that is used to measure an object's resistance to changes in rotation is

a)

mass

b)

moment of inertia

c)

torque

d)

angular velocity

32.

The newton-second is a unit of

a)

work.diamater

b)

angular momentum

c)

linear momentum

d)

none of the above

33.

A net torque applied to a rigid object always tends to produce:

a)

linear acceleration

b)

rotational equilibrium

c)

angular aceleration

d)

rational inertia

34.

How many rad/s is 25 revolutions per minute equivalent to?

a)

0.42 rad/s

b)

2.6 rad/s

c)

160 rad/s

d)

240 rad/s

35.

A wheel with a diameter of 26 turns 1500 rpm. How far will a point on the outer rim moves in 2.0 s?

a)

3.1 m

b)

41 m

c)

90 m

d)

180 m

Longtest

Total questions: 35

Worksheet time: 1hrs 10mins

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