HomePhysics Class 11Laws of motion - MCQ test 1 Laws of motion - MCQ test 1 Laws of motion Class 11 CBSE - MCQ test 1 Question:1 The unit of Newton is equivalent to: Kg m/s² Kgm/s Kg/m/s² None Question:2 1Kg-wt is equal to : 98N 1N 9.8 None Question:3 Which of following is an example of variable mass system: A car moving on road A bicycle moving A rocket taking off None Question:4 How do you calculate force in variable mass system with constant velocity. using F=ma using F=vdm/dt using F=m/t None Question:5 A feather of mass 5g is dropped from height.It is found to fall down with constant velocity.What is the net force acting on it? 0N 9.8N 98N None Question:6 What is the force applied on a body with 5 kg of mass and an acceleration of 7 m/s2? 3.5N 35N 355N None Question:7 Which of the following statement is not correct for an object moving along a straight path in an accelerated motion? Its speed is changing. It is going away from the Earth. A force is always acting on it. Its velocity is changing. Question:8 According to Newton`s second law of motion , Acceleration produced in an object is : Directly proportional to force applied. Inversaly proportional to mass of object Both a & b None Question:9 The second law of motion gives the measure of which of the following? Acceleration Force Momentum Mass Question:10 An object will possess uniform motion as long as the: Resultant force acting on it begins to decrease. Resultant force acting on it begins to increase . Resultant force acting on it is zero. None Question:11 A force of 5N produces an acceleration of 10m/s^2 in an object of mass m1 and produces an acceleration of 20 m/s^2 in an object of mass m2.What would be the acceleration if both masses combined. 0.5 m/s^2 0.25 m/s^2 6.6 m/s^2 None Question:12 A force of 100 dyne act on a mass of 5g for 10 sec. The velocity produced is : 2 cm/sec 20 cm/sec 200 cm/sec None of these Question:13 Newton,s first law of motion gives the concept of : Mass Inertia Force None Question:14 A body of mass 2 kg is moving with velocity 8m/s on a smooth surface.If it is brought to restin 4 secthen the force applied on it is: 8N 6N 4N 2N Question:15 What is the net force of a kite that is held stationary in the sky? Increasing Decreasing zero None Question:16 When an external force is not applied to the system, its total momentum: 3 unit 4 unit 5 unit None of these Question:17 If the force acting on the body is zero. Its momentum is: Becomes zero Increases gradually Remains constant None Question:18 Two balls A and B, of masses m and 2m are in motion with velocities 2v and v respectively. Compare the force needed to stop them in the same time. 2:1 1:2 3:1 1:1 Question:19 What force can change the velocity of a body of mass 1kg from 20 m/s to 30m/s in two seconds? 20N 30N 40N 10N Question:20 Find the time for which a force of 1kgwt acts on a body of mass 1 kg moving with a uniform speed of 4m/s to stop the body. 0.1S 0.2S 0.3S 0.4S Submit Newer OlderLaws of motion - MCQ test 1
