MULTI UNIT QUESTION 1. Anthony (71 kg) does a sliding dive in a volleyball game. He starts the slide at a speed of 30 km/h ana skids
to a stop as he saves the ball from hitting the floor. The coefficient of sliding friction between Anthony and the
gym floor is 0.58
a) Calculate the work done by friction to stop Anthony using two different methods
b) Explain why the work done by friction is negative for both methods.
c) Explain how this scenario obeys the law of conservation of energy, including all types of energies
involved and any assumptions required

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Name two kinds of practical electric pumps.

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j