.webp "Class 11th Physics | Laws of Motion | MCQ")
💥Class 11th Physics Laws of Motion MCQ💥
Q.1 A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's
(A) First law
(B) Second law
(C) Third law
(D) Law of gravitation
Q.2 If the force of gravity suddenly disappears
(A) The mass of all bodies will become zero
(B) The weight of all bodies will become zero
(C) Both the mass and weight of all bodies will become zero
(D) Neither mass nor weight of all bodies will become zero
Q.3 When a horse pulls a wagon, the force that causes the horse to move forward is the force
(A) He exerts on the wagon
(B) The wagon exerts on him
(C) The ground exerts on him
(D) He exerts on the ground
Q.4 A particle is acted upon by a force given by (F = 12t+3t²) N , where t is in seconds. Find the change in momentum of that particle from t=1 to t=3 sec
(A) 70
(B) 55
(C) 74
(D) 51
Q.5 In which of the following processes no force is needed
(A) For uniform acceleration
(B) For uniform motion
(C) For linear motion
(D) To keep the momentum constant
Q.6 A force of 10 N is applied to a mass of 10 Science gm for 10 seconds. The change of momentum in kgm/s units will be
(A) 10
(B) 100
(C) 1000
(D) 0.01
Q.7 A ball moving with a velocity 20m/s has a mass of 50gm. If collides against a wall normally and is rebounded normally with the same speed. If the time of impact of the ball and the wall is 40 mili seconds, the average force exerted on the wall in dynes is
(A) zero
(B) 1.25×10⁷
(C) 2.5×10⁷
(D) 5×10⁶
Q.8 In a circus a horse rider takes a vertically jump on a moving horse, and falls back on the horse because
(A) the inertia of motion is present
(B) the length of the circus horse is large
(C) the motion is in circular path
(D) in reality the rider does not jump
Answer
Q.1 (C)
Q.2 (B)
Q3 (C)
Q.4 (C)
Q5 (D)
Q.6 (B)
Q7 (D)
Q.8 (A)