Newton's Laws of Motion NDA Questions

NDA Physics

Newton's Laws of Motion MCQ Questions


13.
According to Newton's first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by a
A.
gravitational force
B.
net external force
C.
frictional force
D.
centripetal force
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ANSWER :
B. net external force
14.
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its
A.
velocity
B.
mass
C.
displacement
D.
kinetic energy
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ANSWER :
B. mass
15.
When you push a heavy box across the floor, the friction force acting on the box is a(n) ________ force
A.
external
B.
normal
C.
contact
D.
internal
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ANSWER :
C. contact
16.
If a 10 kg object experiences a net force of 20 N, what is its acceleration?
A.
2 m/sĀ²
B.
10 m/sĀ²
C.
20 m/sĀ²
D.
200 m/sĀ²
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ANSWER :
A. 2 m/sĀ²
17.
Which of the following scenarios represents the application of Newton's first law of motion?
A.
A car accelerates when the driver presses the accelerator pedal
B.
A soccer ball comes to rest after being kicked across the field
C.
A rocket is launched into space
D.
A tennis ball changes direction after bouncing off the ground
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ANSWER :
B. A soccer ball comes to rest after being kicked across the field
18.
According to Newton's second law of motion, what happens to the acceleration of an object if the net force acting on it is doubled?
A.
The acceleration is doubled
B.
The acceleration is halved
C.
The acceleration remains the same
D.
The acceleration becomes zero
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ANSWER :
A. The acceleration is doubled