NEET Physics: Laws of Motion Practice Questions

Q1. A body is held stationary on a frictionless surface by the action of two tension forces, T₁ and T₂, acting at angles θ₁ and θ₂ with the horizontal. For the body to remain in equilibrium, which condition must be satisfied regarding these forces?

• AThe net force acting on the body must be zero
• BThe magnitudes of the forces must be equal (T₁ = T₂)
• CThe sum of the components must be zero
• DThe forces must be acting in the same direction

Q2. If the speed of an object in a circle is doubled while the radius remains the same, how does the required centripetal force change?

• AIt is doubled
• BIt is quadrupled
• CIt is halved
• DIt remains the same

Q3. If the net external force acting on an object is zero, what happens to its linear momentum?

• AIt increases
• BIt remains unchanged
• CIt decreases
• DIt becomes zero

Q4. Impulse is defined as the product of the force applied and the time interval over which the force acts. What is the unit of impulse?

• AJoule
• BNewton
• CNewton-second
• Dkg⋅m/s

Q5. If the mass of an object is halved and the same net force is applied, the resulting acceleration will be:

• AQuadrupled
• BDoubled
• CHalved
• DIncreased by a factor of 8

Q6. The force of static friction is always:

• Agreater than kinetic friction
• Bequal to kinetic friction
• Cless than kinetic friction
• Dzero

Q7. According to Newton's Third Law of Motion, the action and reaction forces always act on which two bodies?

• AThe same direction and same body
• BThe same direction
• CDifferent bodies
• DThe same body

Q8. A cannon of mass 10 kg fires a shell of mass 0.5 kg horizontally with a velocity of 200 m/s. What is the recoil velocity of the cannon?

• A100 m/s
• B150 m/s
• C250 m/s
• D300 m/s

Q9. What is the role of friction in a vehicle moving on a banked road?

• AIt provides the necessary horizontal force to maintain equilibrium.
• BIt increases the necessary banking angle.
• CIt is entirely balanced by the banking force.
• DIt ensures the vehicle moves at the ideal speed.

Q10. A body is placed in a container and remains at rest. If the external force applied to it is zero, what is the state of motion of the body?

• AIt is moving at constant velocity.
• BIt is at rest.
• CIt is accelerating.
• DIt is moving with zero momentum.

Q11. Which component of acceleration is responsible for changing the direction of the velocity in circular motion?

• ACentripetal acceleration
• BGravitational acceleration
• CTangential acceleration
• DNormal acceleration

Q12. Which of the following is the fundamental statement of Newton's First Law of Motion?

• AAn object remains in a state of rest or uniform motion unless acted upon by an external force.
• BForce is the rate of change of momentum.
• CAction and reaction forces are always equal and opposite.
• DForce is equal to mass times acceleration.

Q13. Newton's Second Law states that the acceleration of an object is directly proportional to the net force applied to it, provided the mass remains constant. Which of the following is true?

• AAcceleration is proportional to the square of the force.
• BAcceleration is directly proportional to the net force.
• CAcceleration is independent of both force and mass.
• DAcceleration is inversely proportional to mass.

Q14. A rope is used to swing a ball in a horizontal circle. The tension in the rope provides the necessary centripetal force. If the ball is moving at a constant speed, the net force acting towards the center of the circle is:

• ADirected tangentially
• BDirected radially outwards
• CDirected towards the center of the circle
• DZero

Q15. When a wheel rolls without slipping, the friction force acting at the point of contact is best described as:

• AA force causing linear acceleration
• BA static friction force
• CA force related to rotational inertia
• DA force opposing the motion