Laws of Motion Test

Result

Laws of Motion Test - 6

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Question 1
1 / -0

force is required

A
only to keep an object moving

B
only to start a stationary object moving

C
only to stop a moving object

D
to start a stationary object and to stop a moving object

Solution

force is required to start a stationary object and to stop a moving object due to inertia. Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. This is also called law of inertia or newton's first law of motion
Question 2
1 / -0

According to first law of motion

A
body acted on by net force moves with constant velocity (which may be zero)

B
body acted on by zero net force moves with non zero acceleration

C
body acted on by no net force moves with constant velocity (which may be zero) and zero acceleration

D
body acted on by no net force moves with increasing velocity and negative acceleration

Solution

If net force act on a body then acceleration of the body will also be zero.Hence velocity will not be changed i.e. it continues in its existing state of rest or uniform motion in a straight line.
Question 3
1 / -0

Inertia refers to

A
slow motion

B
ease of motion

C
dullness

D
resistance to change

Solution

Inertia is the resistance of any physical object to any change in its state of motion; this includes changes to its speed, direction, or state of rest. It is the tendency of objects to keep moving in a straight line at constant velocity. Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
Question 4
1 / -0

Force is a

A
qualitative measure of the interaction between two bodies

B
quantitative measure of the interaction between two bodies

C
quantitative measure of the momentum between two bodies

D
qualitative measure of the momentum of two bodies

Solution

Newton's second law of motion gives the quantitative definition of force. The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object