In the arrangement of spring and block in the video, we first pull the block from x = 0 out to x = 2.0 cm. The work done by the spring force is W₁. We next pull the block from x = 0 out to x = 6.0 cm. How much work is done by the spring force? O 2W₁ O 9W₁ O W₁ O 8W₁ O 3W₁ O 6W₁

A factory worker moves a 20.0 kg crate a distance of 4.40 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.200.   Part A: What magnitude of force must the worker apply?   Part B: How much work is done on the crate by the worker's push?   Part C: How much work is done on the crate by friction?   Part D: How much work is done by the normal force and by the gravity?   Part E: What is the net work done on the crate?

The figure below shows a person lifting a box with a mass (m) of 13.5 kg a height (h) of 1.3 m. Determine the work done on the box by the earth (gravitational force).

A 150g book is initially at rest on a table that has no friction. A force of 3.2 N is applied to the book which moves over a distance of 1.2 m. The table is 1.4m high. a) What is the work done by the force on the book? b) What is the final speed of the book? c) What is the final kinetic energy of the book? d) What is the gravitational potential energy of the book relative to the table?

Steven carefully places a m = 1.45 kg wooden block on a frictionless ramp so that the block begins to slide down the ramp from rest. The ramp makes an angle of 0 = 53.3° up from the horizontal. Which forces do nonzero work on the block as it slides down the ramp? ☐ gravity How much total work Wnet has been done on the block after it slides down along the ramp a distance of 1.87 m? Nancy measures the speed of the wooden block after it has gone the 1.87 m down the ramp. Predict what speed u she should measure. Now, Steven again places the wooden block back at the top of the ramp, but this time he jokingly gives the block a big push before it slides down the ramp. If the block's initial speed is 2.00 m/s and the block again slides down the ramp 1.87 m, what should Nancy measure for the speed v of the block this time? ☐ spring friction normal J Wnet = v = m/s v = m/s

A child throws a stone upwards. While the stone is moving upwards the gravitational force does positive work on it and the gravitational potential energy increases. the gravitational force does positive work on it and the gravitational potential energy decreases. the gravitational force does negative work on it and the gravitational potential energy increases. O the gravitational force does negative work on it and the gravitational potential energy decreases.

X A 10 Kg object is raised to a height of 2m in 5s. What is the rate of work done? * 10 W- 10 メ 10 -100 15 O 20 - 1000 40

Hello, can you help me with this problem please? Thank you.

A man starts at ground level and carries a 20 kg box up a flight of stairs to a height of 3.6 m. He then carries the box down an adjacent flight of stairs back to ground level and ends up 10 m away from where he started. What is the total amount of work the man has done? Explain

Do the following situations result in positive work, negative work, or zero work? Force is perpendicular to displacement. A force slows an object down. Force acts in the same direction as displacement. Force acts in the opposite direction of displacement. A force acts on an object that remains stationary.