The fastest measured pitched baseball left the pitcher’s hand at a speed of 45.0 m/s. If the pitcher was in contact with the ball over a distance of 1.50 m and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?

A fireworks rocket explodes at a height of 42.0 m , producing fragments with velocities ranging from 8.68 m/s downward to 16.7 m/s upward. Over what time interval are fragments hitting the ground?             Needs Complete solution with 100 % accuracy.

A Fast Pitch. The fastest measured pitched baseball left the pitcher's hand at a speed of 45.0 m/s. If the pitcher was in contact with the ball over a distance of 1.50 m and produced con- stant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?

A crate slides across a frictionless horizontal surface with constant acceleration 4.15 m/s2 and over a time interval reaches a final velocity of 10.0 m/s. (a) If its initial velocity is 5.00 m/s, what is its displacement (in m) during the time interval? (Indicate the direction with the sign of your answer.) m (b) What is the distance it travels (in m) during this interval? (c) If its initial velocity is –5.00 m/s, what is its displacement (in m) during the time interval? (Indicate the direction with the sign of your answer.) (d) What is the total distance it travels (in m) during the interval in part (c)?

The smal archerfish Dength 20 to 25 cm) lives in brackish waters of Southeast Asia from India to the Philippines. This aptly named creature captures its prey by shooting a stream of water drops at an insect. either flying or at rest. The bug falls into the water and the fish gobbles it up. The archerfish has high accuracy at distances of 1.2 m to 1.5 m, and it sometimes makes hits at distances up to 3.5 m. A groove in the roof of its mouth, along with a curled tongue, forms a tube that enables the fish to impart high velocity to the water in its mouth when it suddenly closes its gill flaps. Suppose the archerfish shoots at a target that is 2.40 m away, measured along a line at an angle of 30.0° above the horizontal. With what velocity must the water stream be launched if it is not to drop more than 5.00 cm verticaly on its path to the target? 22.65 Your response is within 10% of the correct value. This may

A ball of moist clay falls 17.7 m to the ground. It is in contact with the ground for 21.0 ms before stopping. (a) What is the average acceleration of the ball during the time it is in contact with the ground? (Treat the ball as a particle.) (b) Is the average acceleration up or down?

a parachutist opens his chute at time t=0, while falling vertically at a speed of 50.0 m/s. From the combined effects of gravity and air resistance, he is subject to anupward acceleration of  ay= (40/T)e-t/T  where T=6.8s. Find the parachutist's speed 10s after the chute is opened and the distance fallen during that period of time.

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 8.06 m/s when going down a slope for 1.61 s? (b) How far does the skier travel in this time?

A bullet shot straight up returns to its starting point in 63.7 s. embedding itself 15.5 cm deep in a wooden block. What is the average acceleration the bullet encounters in the block (in standard units)? Answer: Check