Free Force and Motion MCQs with Answers
1,416 Force and Motion MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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1,416 questions · page 63 of 71
- A. mp2/r
- B. rm/p
- C. p2/rm
- D. pmr
Explanation: Option C is correct.The radial force is the centripetal force that keeps the particle moving in a circular path.
Correct answer: p2/rm- A. Momentum
- B. Force/Time
- C. velocity
- D. none
Explanation: Here is the explanation of the correct option
Correct answer: Momentum- A. 1:1
- B. 1:2
- C. 2:1
- D. 1:4
Explanation: Here is the explanation of the correct option
Correct answer: 1:1- A. Two times
- B. 3 times
- C. Four times
- D. Remains same
Explanation: As KE=1/2*mv2=p2/2mKE∝p2KE1=p12 eq1KE2=p2² eq2Dividing eq2 by eq 1,we getKE2/KE1=p2²/p1² eq3 taking p1as p and p2 as 2pput value in eq 3we…
Correct answer: Four times- A. 1 : 2
- B. 1 : 1
- C. 4 : 1
- D. 1 : 4
Explanation: Given:Kinetic energy ratio: KE_1 / KE_2 = 4/1Linear momentum: p_1 = p_2Relationship between kinetic energy (KE), momentum (p), and mass…
Correct answer: 1 : 4- A. Increases
- B. Decreases
- C. Becomes zero
- D. Remains the same.
Explanation: When a bullet is fired and passes through a bag of sand, the principle of conservation of momentum applies.
Correct answer: Decreases- A. Heat
- B. Mass
- C. Energy
- D. Momentum
Explanation: The correct answer is Momentum. Rocket propulsion is explained by Newton's third law of motion: for every action, there is an equal and…
Correct answer: Momentum- A. Less
- B. Zero
- C. Equals
- D. Greater
Explanation: The impulse imparted on an object during a collision is equal to the change in momentum of that object.
Correct answer: Equals- A. Mass of the body
- B. velocity of the body
- C. tension in the string
- D. centripetal acceleration
Explanation: The centripetal force required to keep an object moving in a circular path is provided by tension in the string, directed towards the…
Correct answer: tension in the string- A. maximum
- B. zero
- C. Equal to the weight of the stone
- D. less than the weight of the stone
Explanation: At the highest point in the vertical circle, the tension in the string must provide the centripetal force needed to keep the stone in…
Correct answer: Equal to the weight of the stone- A. Follows directly from Newton's second law
- B. Is the definition of angular acceleration
- C. Is the definition of linear acceleration
- D. Is the definition of torque
Explanation: Newton's second law for rotational motion is \( \tau = I\alpha \), where \( \tau \) is the net torque, \( I \) is the rotational inertia…
Correct answer: Follows directly from Newton's second law- A. 588 N
- B. 294 N
- C. 58.8 N
- D. 882 N
Explanation: To find the apparent weight, we subtract the force due to acceleration (\(ma\)) from the actual weight (\(mg\)).
Correct answer: 294 N- A. Double
- B. Half
- C. Negative
- D. 0
Explanation: When the jet plane dives down with an acceleration of 9.8m/s^2, the apparent weight of the pilot decreases to half due to the opposing…
Correct answer: Half1254. A car is moving with high velocity when it has a turn. A force acts on it outwardly because of
- A. Centipetal force
- B. Gravitational force
- C. Centrifugal force
- D. All the above
Explanation: Option C is correct.A car is moving with high velocity when it has a turn .
Correct answer: Centrifugal force- A. 4N
- B. 400N
- C. 40N
- D. 4000N
Explanation: The explanation is as follows To calculate the centripetal force acting on a car of mass 1000kg moving with speed 72km/h in a circular…
Correct answer: 4000N- A. 12m/s
- B. 20m/s
- C. 17m/s
- D. None
Explanation: Here is the explanation of the correct optionvi = 0a = F/m=16i + 12j|a| = 20m/s2(Vf)2 = (vi)2 +2as= 0 + 2(20)(4)vf = √160 or 12.43
Correct answer: 12m/s- A. Static equilibrium.
- B. Stable equilibrium.
- C. Unstable equilibrium.
- D. Dynamic equilibrium.
Explanation: Dynamic equilibrium occurs when an object is moving at a constant velocity (zero acceleration) and the net force acting on it is zero.
Correct answer: Dynamic equilibrium.- A. - 1 N.
- B. 0 N.
- C. 1⁄2 N.
- D. 1 N.
Explanation: An object is in equilibrium when the net force acting upon it is 0 N. This means that all the forces cancel each other out, resulting in…
Correct answer: 0 N.- A. The object will accelerate in the opposite direction.
- B. The object will remain stationary.
- C. The object's speed will increase.
- D. The object will continue moving in the same direction.
Explanation: When a force is applied to an object, it causes the object to accelerate in the direction of the force.
Correct answer: The object will accelerate in the opposite direction.- A. Is always at rest.
- B. Has zero acceleration.
- C. Moves with uniform velocity.
- D. Moves with some acceleration.
Explanation: A non-inertial frame of reference is one that experiences acceleration.
Correct answer: Moves with some acceleration.