# Physics Review

66 Questions | Total Attempts: 39  Settings  Review for physics 1210

Related Topics
• 1.
A distance of 1*10^-9 km is equivalent to a distance of
• A.

1 nm

• B.

1 um

• C.

1 mm

• D.

.1 mm

• E.

None

• 2.
What are the 3 basic units in the scientific system of units (SI system) we have used in class?
• A.

Miles, kilograms, seconds

• B.

Meters, kelvins, seconds

• C.

Miles, pounds, seconds

• D.

Meters, kilograms, seconds

• E.

Meters, kilograms, mi/hour

• 3.
The speed of light is about 3.00x10^8 m/s. Whats the speed of light in miles/hour? (1 mile = 1609 meters)
• A.

6.71 x 18^8 miles/hr

• B.

1.34 x 10^8 miles/hr

• C.

3.00 x 10^8 miles/hr

• D.

186,000 miles/hr

• E.

None

• 4.
All except one of the following require the application of a net force. Which ones the expection?
• A.

To change an object from a state of rest to a state of motion

• B.

To maintain an object in motion at a constant velocity

• C.

To change an objects speed w/out changing its direction of motion

• D.

To maintain an object in uniform circular motion

• E.

To accelerate an object

• 5.
Consider a 50 kg person held up by a rope in the diagram shown. The tension in the rope is __________________________\\\\\\\\\\\\\\\\\   0   /////////////////////
• A.

Equal to the persons weight

• B.

Half the persons weight

• C.

Between 250 and 500 N

• D.

Greater than 500 N

• E.

50 Kg

• 6.
A rocket flies at constant velocity straight up. whats the direction of the net force on the rocket?
• A.

Up

• B.

Down

• C.

Can not be determined w/out knowing rocket mass

• D.

Cant be determined w/out knowing the wind resistance

• E.

None of the previous

• 7.
A hot rod starting at rest and uniformly accelerating covers a distance of 400 meters in 15 seconds. What is the acceleration to two significant figures?
• A.

3.6 m/s^2

• B.

4.4 m/s^2

• C.

2.2 m/s^2

• D.

27 m/s^2

• E.

None

• 8.
A ball is thrown up at 15 m/s, whats the velocity after 3.0 seconds?
• A.

14 m/s up

• B.

14 m/s down

• C.

44 m/s up

• D.

44 m/s down

• E.

None

• 9.
A 20.0 kg block on a smooth horizontal surface is acted upon by two horizontal forces: a force of 20 N acting to the left and a force of 60 N to the right? The acceleration fo the block will be
• A.

3.0 m/s^2 to the right

• B.

4.0 m/s^2 to the right

• C.

40 m/s^2 to the right

• D.

2.0 m/s^2 to the left

• E.

None

• 10.
Which of the following units would be approriate to describe force?
• A.

Kg*m/s^2

• B.

M/s^2

• C.

Kg/s

• D.

Kg*m/s

• E.

None

• 11.
What is the magnitude of the accleration produced by a net force of 4500 N acting on a 900 kg automobile?
• A.

.20 m/s^2

• B.

3.8 m/s^2

• C.

5.0 m/s^2

• D.

9.8 m/s^2

• E.

None

• 12.
A 150 lb student races up stairs with a vertical height of 3.0 m in 4.0 seconds to get to class on the second floor. how much power in watts does the student expend in doing work against gravity? (Hint: The equivalent weight of 1 kg mass = 2.2 lbs, so the students mass in kilograms 68 kg)
• A.

51 W

• B.

167 W

• C.

5.0 * 10^2 W

• D.

890 W

• E.

None

• 13.
A 0.15 kg ball traveling with a speed of 50 m/s is brought to rest in a catcher's mitt with an average force of 75 N. What is the maginutde of the impulse exerted by the mitt on the ball?
• A.

75 Ns

• B.

11.3 Ns

• C.

3750 Ns

• D.

7.5 Ns

• E.

None

• 14.
A 5.0-kg cat travels to the left at 10 m/s and a 10-kg dog travels to the right at 5.0 m/s. The total momentum is
• A.

125 kg m/s to the left

• B.

0

• C.

50 kg m/s to the right

• D.

100 kg m/s to the right

• E.

None

• 15.
Money (US paper bill) was used in class to illustrate
• A.

How to convert between different units or denominations

• B.

Decimal, or powers of 10, notation

• C.

Using algebraic equations to describe word (finance) problems

• D.

Free fall

• E.

None

• 16.
A child plays on a see-saw with her father. The child has a weight of 250 N and is seated 2.5 m from the axis of rotation. Her father balances her when he is seated 0.80 m from the axis. The fathers weight is
• A.

250 N

• B.

500 N

• C.

667 N

• D.

725 N

• E.

750 N

• 17.
A book weighing 10 N is held at rest in the palm of the hand. The reaction to the force of the hand on the book is a force of
• A.

10 N exerted by the Earth on the book

• B.

10 N exerted by the book on the Earth

• C.

10 N exerted by the book on the hand

• D.

0 N

• E.

9/8 m/s^2 in the downward direction arising from the force of the eart

• 18.
A ball is projected upward with an initial velocity of 5 m/s. It will reach its maximum height in approximately
• A.

0.5 s

• B.

1.0 s

• C.

49 s

• D.

2.0 s

• E.

0.0 s

• 19.
The tablecloth pull demo (where objects remain on the table when the tablecloth is pulled out from under theM) was used in class to demonstrate
• A.

Conservation of momentum

• B.

Action and reaction

• C.

Conservation of energy

• D.

Newton's 2nd Law

• E.

Newton's 1st Law

• 20.
A force of 40 N is applied at the end of a wrench that is 0.2 meters from the axis of the bolt. The direction of the force points along the legnth of the wrench. The magnitude of the torque created is
• A.

40 Nm

• B.

0.2 Nm

• C.

0.0 Nm

• D.

8 Nm

• E.

Angel of force on wrench must be given

• 21.
A student, sitting on a stool rotating at a rate of 12 RPM, holds masses in each hand. When her arms are pulled in, the total rotational inertia of the system is 2.0 kg m^2. She then extends her arms form her body, increasing the total rotational inertia to 5.0 kg m^2. If there are no external torques, what is the new rotational velocity of the system?
• A.

30 RPM

• B.

60 RPM

• C.

4.8 RPM

• D.

12 RPM

• E.

None

• 22.
If an astronaut landed on a planet that was three times the diameter and three times the mass of earth, how would his weight there compare with that on earth?
• A.

Same

• B.

Three times as much

• C.

One ninth as much

• D.

One third as much

• E.

None

• 23.
The nucleus of an atom is made of
• A.

Protons

• B.

Neutrons

• C.

Electrons

• D.

Protons & electrons

• E.

Protons & neutrons

• 24.
Consider a small 3-d model of uniform denisty but arbitrary shape with a mass of 2.0 kg. Now scale all dimensions of the mdoel up by a factor of 5. What would be the new model's mass?
• A.

2.0 kg

• B.

10 kg

• C.

50 kg

• D.

500 kg

• E.

250 kg

• 25.
A hydraulic jack is used to lift a load of weight 2.0 x 10^3 N. The load-bearing cylinder has a radius of 4.0 cm, and the other piston has a radius of 1.0 cm. What force must be exerted on the smaller piston to support the load (2 sig figs)?
• A.

1.6 x 10^4 N

• B.

6.2 x 10 N

• C.

1.3 x 10^2 N

• D.

1.0 x 10^3 N

• E.

None