10. An object moves in the x-y plane subject to a force F(x.y) = y i + (x + y) j How much work is done by this force if the object moves in a straight line from the point (0,1) to the point (1,2)? (Hint: you must find the equation of the line.) 11. Mars has mass of 6.42 × 1023 kg and a radius of 3,380 km. a) What is the acceleration of gravity at the surface of Mars? b) How long would it take an object to fall 10.0 meters from rest on Mars? c) Phobos, a moon of Mars, orbits Mars at a distance of 6,000 km from the surface of Mars. What is its orbital speed

10. An object moves in the x-y plane subject to a force F(x.y) = y i + (x + y) j How much work is done by this force if the object moves in a straight line from the point (0,1) to the point (1,2)? (Hint: you must find the equation of the line.) 11. Mars has mass of 6.42 × 1023 kg and a radius of 3,380 km. a) What is the acceleration of gravity at the surface of Mars? b) How long would it take an object to fall 10.0 meters from rest on Mars? c) Phobos, a moon of Mars, orbits Mars at a distance of 6,000 km from the surface of Mars. What is its orbital speed

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 4P: a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the...

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a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
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