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3 Dec 2020

A rough surface brings a box of mass 500 g travelling at 3 m/s to rest in 5 s. What is the power exerted by the rough surface to stop the box?

Booster class
Mechanics 1
Skill
Understanding the concept of power
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Amana Rangarajan
Amana RangarajanLv9
3 Dec 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A 4.5 kg box slides down a 4.8-m -high frictionless hill, starting from rest, across a 2.0-m -wide horizontal surface, then hits a horizontal spring with a spring constant of 520 N/m. The other end of the spring is anchored against a wall. The ground under the spring is frictionless, but the 2.0-m-long horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.24.

What is the speed of the box just before reaching the rough surface?

Consider a box that isplaced on different surfaces.

a) In which situation (s) is there no force acting on thebox?
b) In which situation (s) is there a static friction force actingon the box?
c) In which situation (s) is there a kinetic friction force actingon the box?


Various possible situationsare as under:

I. The box is at rest on a rough horizontalsurface.
II. The box is at rest on a rough tiltedsurface.
III. The box is on the rough-surfaced flat bed ofa truck- the truck is moving at a
constant velocity on a straight, level road and the box remains inthe same
place in the middle of the truck bed.
IV. The box is on the rough-surfaced flat bed of atruck- the truck is speeding up
on a straight, level road, and box remains in the same place in themiddle of
the truck bed.
V. The box is on the rough-surfaced flat bed of atruck- the truck is climbing a
hill, and the box is sliding towards the back of the truck.

Consider a box that is placed on different surfaces.

a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?

Ā 


Various possible situations are as under:

I. The box is at rest on a rough horizontal surface.
II. The box is at rest on a rough tilted surface.
III. The box is on the rough-surfaced flatbed of a truck- the truck is moving at a
constant velocity on a straight, level road and the box remains in the same
place in the middle of the truck bed.
IV. The box is on the rough-surfaced flatbed of a truck- the truck is speeding up
on a straight, level road, and the box remains in the same place in the middle of
the truck bed.
V. The box is on the rough-surfaced flatbed of a truck- the truck is climbing a
hill and the box is sliding towards the back of the truck.

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