A cricket ball of mass 150g moving with a speed of 126km/h hits at the
middle of the bat, held firmly at its position by the batsman. The ball moves straight back to the bowler after hitting the bat. Assuming that collision between ball and bat is completely elastic and the two remain in constant
for 0.001s, the force that the batsman
had to apply to hold the bat firmly at its place would be:
Q2PhysicsUnit 4: Work, Energy and Power
Which one of the following statement is
false?
Q3PhysicsUnit 4: Work, Energy and Power
A body of mass 5 kg has momentum of
10kgm/sec. When a force of 0.2N is
applied on it for 10 sec, the change in its kinetic energy is:
Q4PhysicsUnit 4: Work, Energy and Power
The graph between the resistive force
acting on a body and the position of
the body travelling in a straight line is
shown in the figure. The mass of the
body is 25kg and initial velocity is 2 m/s.When the distance covered by the
bodyi s4m, its kinetic energy would be
Q5PhysicsUnit 4: Work, Energy and Power
A3kg object has initial velocity (6i^−2j^)m/s. The total work done on the
object if its velocity changes to (8i^+4j^)m/s is :
Q6PhysicsUnit 4: Work, Energy and Power
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200N to the lower end. The weight stretches the wire by 1 mm. Then the energy stored in the wire is
Q7PhysicsUnit 4: Work, Energy and Power
Potential energy is classified into which
two energy?
Q8PhysicsUnit 4: Work, Energy and Power
Which of the following forms of energy
is released or absorbed in most
chemical reactions?
Want unlimited Work, Energy and Power practice?
Pro unlocks the full question bank, topic filters, and attempt history.
