A1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30° below the horizontal just before it strikes a horizontal surface. the ball leaves this surface 0.50 s later with a velocity of 2.0 m/s directed 60° above the horizontal. what is the magnitude of the average resultant force on the ball?

Impulse(change in momentum). The average force on the ball is equal to the change in momentum over time. I’ve shown my work. Remember to find the change in the velocities’ vertical component because the force acts vertically on the ball and does not change its horizontal velocity.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

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