Applications of Newton's Second Law or Impulse of Force
Important Questions on Applications of Newton's Second Law or Impulse of Force
Figure shown is the velocity-time graph of a toy car rolling over a marble floor in a straight line. If the mass of the car is , how much force does marble exert on the toy car to bring it to rest?
A cricket player holds a cricket ball of mass by moving his hands backward by . If the initial velocity of the ball is find the retarding force applied by the player.
A car of mass , moving at is brought to rest over a distance of . Find the retarding force developed by the brakes of the car?
A golfer hits a ball at rest, such that the contact between the ball and golf stick is for . If the golf ball covers a linear distance of in , calculate the magnitude of force applied. Assume there is no friction and the mass of the golf ball is .
Why does a player move his hands backward while taking a catch? Explain.
Why does one get hurt seriously while jumping on a hard floor? Explain.
Why is the body of cars, scooters, etc, is mounted on flat springs? Explain.
Why are the glass and porcelain articles packed in straw, foam or cardboard?
Why are the long jump athletes made to jump in sand pits? Explain.
Why are we not hurt at all, while diving in a deep water tank from a height of ? Explain.
Why is the term impulse of force coined?
Write an expression for impulse of force in terms of (i) force and time, (ii) change in momentum.
State the units of impulse of force in SI system ?
When a hockey ball is hit with a hockey stick, in which of the following cases will the impulsive force be the largest when time interval is
(a)
(b)
(c) ?
What do you understand by the term impulse of force?
A batsman hits a cricket ball, which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows down to stop because:
A force acts on a stationary body for the time . The distance covered by the body will be proportional to:
