Correct Marks 1
Incorrectly Marks 0
Q 1. A shell of mass 0.020 kg is fired by a gun of mass 100 kg If the muzzle speed of the shell is 80 m/s, the recoil speed of the gun -
14 m/s
0.012 m/s
0.016 m/s
100 m/s
Correct Marks 1
Incorrectly Marks 0
Q 2. Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 m/s collide and rebound with the same speed The magnitude of impulse imparted to each ball due to the other -
0.6 kg m/s
zero
6 kg m/s
none of these
Correct Marks 1
Incorrectly Marks 0
Q 3. Assertion: Large force is required to move a body uniformly along a straight path
Reason: A body moving with uniform acceleration has a constant force acting on it
Both Assertion and Reason are true and Reason is the correct explanation of 'Assertion'
Both Assertion and Reason are true and Reason is not the correct explanation of 'Assertion'
Assertion is true but Reason is false
Assertion is false but Reason is true
Correct Marks 1
Incorrectly Marks 0
Q 4. Which of the following statements is/are not correct ?
A force is needed to keep a particle moving along a straight line with uniform velocity
The same force for the same time causes the same change in momentum for different bodies
Frictional force opposes both motion as well as relative motion
It is not motion, but relative motion that the frictional force opposes
Correct Marks 1
Incorrectly Marks 0
Q 5. A force of 50 dynes is acted on a body of mass 5g which is at rest for an interval of 3sec. The impulse is
{tex}{0.15}\times{10^{-3 }}{/tex}Ns
{tex}{0.98}\times{10^{-3 }}{/tex}Ns
{tex}{1.5}\times{10^{-3 }}{/tex}Ns
{tex}{2.5}\times{10^{-3 }}{/tex}
