Physics Bridge Course

1.

Multiple Choice

30 sec

1 pt

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. Which law explains this?

Newton's 1st Law

Newton's 2nd Law

Newton's 3rd Law

None of these

2.

Multiple Choice

30 sec

1 pt

Momentum is related to Newton's first law.

True

False

3.

Multiple Choice

30 sec

1 pt

What will happen to a penny and a feather dropped from the same height in the absence of air?

They will fall at different rates.

They will not have momentum.

They will float

They will fall at the same rate.

4.

Multiple Choice

30 sec

1 pt

Force exerted on a body changes it's

Direction of motion

Momentum

Kinetic energy

All of these

5.

Multiple Choice

30 sec

1 pt

An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. The force required to keep the object moving with the same velocity is:

2 N

32 N

0 N

56 N

6.

Multiple Choice

30 sec

1 pt

Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:

Have same magnitude and direction

Acts on either body at normal to each other

Always act on the same body

Always act on the different bodies in opposite directions

7.

Multiple Choice

30 sec

1 pt

A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

Move backward

Move forward

Come to the rest

Be unaffected

8.

Multiple Choice

30 sec

1 pt

When the velocity triples, the kinetic energy increases by ______ times.

9

3

1.5

16

9.

Multiple Choice

30 sec

1 pt

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

15 J

0 J

25 J

82 J

10.

Multiple Choice

30 sec

1 pt

In which situation is work not done?

lifting a 20 pound box off the floor

holding a 20 pound box above the floor

sliding a 20 pound box across the floor

sliding a 20 pound box up an inclined plane

11.

Multiple Choice

30 sec

1 pt

Gravitational forces are:

always attractive

always repulsive

sometimes attractive and sometimes repulsive

None of these

12.

Multiple Choice

30 sec

1 pt

The gravitational force between two objects does not depend on:

Sum of the masses

Product of the masses

Gravitational constant

Distance between the masses

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