Please answer number 9 9. Suppose that a runner on a straight track covers a distance of 1 mile in exactly 4 mins. What was his averagevelocity in ft/sec?10. What is the average power expended to accelerate a bullet of 10gm mass to a speed of 800m/s in 1.2 sec?11. Suppose you throw a ball with a mass of 0.40kg against a wall. It hits the wall moving horizontally to the leftat 30m/s and rebounds horizontally to the right at 20m/s. Find the impulse of the net force on the ball during itscollision with the wall.12. Assuming the Earth to be a sphere of radius 4,000 miles, an earth satellite in a circular orbit 300 miles abovethe surface of the earth makes a complete revolution in 96mins. Calculate the linear velocity of the satellite.

Given: Distance covered: s=1 [mile] Time taken to cover that distance: t=4 [mins] The average…

Answered: 9. Suppose that a runner on a straight…

9. Suppose that a runner on a straight track covers a distance of 1 mile in exactly 4 mins. What was his average velocity in ft/sec?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Energy Of A System

Section: Chapter Questions

Problem 25P: Review. You can think of the workkinetic energy theorem as a second theory of motion, parallel to...

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Question

Please answer number 9

9. Suppose that a runner on a straight track covers a distance of 1 mile in exactly 4 mins. What was his average
velocity in ft/sec?
10. What is the average power expended to accelerate a bullet of 10gm mass to a speed of 800m/s in 1.2 sec?
11. Suppose you throw a ball with a mass of 0.40kg against a wall. It hits the wall moving horizontally to the left
at 30m/s and rebounds horizontally to the right at 20m/s. Find the impulse of the net force on the ball during its
collision with the wall.
12. Assuming the Earth to be a sphere of radius 4,000 miles, an earth satellite in a circular orbit 300 miles above
the surface of the earth makes a complete revolution in 96mins. Calculate the linear velocity of the satellite.

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