a tennis player receives a shot with the ball travelling horizontally at 50.0 m/s and returns the shot with the ball traveling horizontally at 40.0 m/s in the opposite direction. what is the impulse delivered to the ball from the tennis racquet?
To find the impulse delivered to the ball by the tennis racquet, you can use the principle of conservation of momentum. The impulse is equal to the change in momentum of the ball.
The momentum of an object is given by the formula:
Momentum = mass * velocity
In this case, since the ball is traveling horizontally, we can consider only the horizontal component of momentum. Also, since mass is constant, we can focus on the change in velocity.
The initial momentum of the ball is given as 50.0 m/s, while the final momentum is -40.0 m/s (since the velocity is in the opposite direction). The change in momentum is the difference between these two values:
Change in momentum = Final momentum - Initial momentum
Change in momentum = -40.0 m/s - 50.0 m/s
Calculating the change in momentum, we have:
Change in momentum = -90.0 m/s
Therefore, the impulse delivered to the ball by the tennis racquet is -90.0 m/s. The negative sign indicates that the impulse is in the opposite direction of the initial momentum.
the change of velocity is 90m/s
impulse=massball*90