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Questions tagged 'Work and Energy'

5 questions

A playground merry-go-round has radius 2.60 m…?

A playground merry-go-round has a radius of 2.60 m and a moment of inertia of 2300 kg·m² about a vertical axle through its center. It turns with negligible friction. (a) A child applies a force of 23...

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Anonymous

Jan 15, 2025

How do you do this work and energy problem? physics urgent help!?

A 4.5 kg box slides down a 4.4 m high frictionless hill, starting from rest. It then travels across a 2.4 m wide horizontal surface before hitting a horizontal spring with a spring constant of 500 N/m...

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Anonymous

Dec 10, 2024

A floating ice block is pushed through a displacement?

A floating ice block is pushed through a displacement vector ( \mathbf{d} = (24 \, \text{m}) \mathbf{i} - (12 \, \text{m}) \mathbf{j} ) along a straight embankment by rushing water. The water exerts a...

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Anonymous

Nov 28, 2024

What is the work done by tension before the block goes up the incline?

A mass ( m = 16 \, \text{kg} ) is pulled along a horizontal surface with no friction for a distance ( d = 7.7 \, \text{m} ). After this, the mass is pulled up an incline that makes an angle ( \theta =...

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Anonymous

Nov 13, 2024

A 1300-N crate rests on the floor. How much work is requred to move it at constant speed…?

A 1300-N crate rests on the floor. How much work is required to move it at a constant speed (a) 4.0 m along the floor against a friction force of 230 N, and (b) 4.0 m vertically? I’m unsure how to app...