In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : A quick collision between two bodies is more violent than a slow collision, even when the initial and the final velocities are identical.
Reason : Because the rate of change of momentum which determines the force is greater in the first case.
A If both Assertion and Reason are true and Reason is the correct explanation of Assertion
B If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C If Assertion is true but Reason is false
D If both Assertion and Reason are false.
disagree with the answer and th explanation provided
Which of the following is weakest force in nature?
A Gravitational force
B Electrostatic force
C Magnetic force
D All of these
i have a doubt. if earth's gravitational force can attract even the moon and magnets cant attract object kept even a metre away from them, then how is gravitational force the weakest?
'An object may be in the rest as well as in the motion at the same time'. Which one of the following is correct explanation for the above statement?
A Rest and motion are defined on basis of position of an object. So a body may be in rest and in the motion at the same time.
B Object is in rest or in motion depends on the reference point. An object may be in motion with respect to a reference point and at same time the object may be in rest with respect to another reference point.
C Rotatory motion justifies the above statement. In the rotatory motion, object rotates around a fixed axis and does not cover distance. Therefore, object is in motion and in the rest at the same time.
D No, it is not possible that an object is in the motion and in the rest as well.