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?
Sun appears to move from east to west around the earth. This means that earth rotates from
A east to west
B west to east
C north to south
D west to north
The ans should be 'B'