Ask question

Ask question

All categories

3 years ago

7

500 J of work are done in 4 seconds to lift a 40 kg box to the top of a high shelf. How much power was required to complete the

lift?

1 answer:

Artemon [7]3 years ago

5 0

Answer:

125 W

Explanation:

Power = work / time

P = 500 J / 4 s

P = 125 W

You might be interested in

Once you start pulling your object with less force than friction, what should you expect your object to do? What about when your

forsale [732]

#Case -1

If Pulling force is less than frictional force the object won't move .

#Case-2

If Pulling force is greater than frictional force then object will be .

In order to calculate friction force you need Limiting friction first .

$\\ \sf\longmapsto F_L=\mu sN$

u s is coefficient of static friction and N is normal reaction

Or

$\\ \sf\longmapsto F_L=\mu smg$

As N=mg

8 0

3 years ago

Read 2 more answers

Why does the position of the ocean ellipse change over the course of a given week?

alekssr [168]

Since the ocean is made of something called WATER, and water flows... the ocean will flow! :D

5 0

3 years ago

Read 2 more answers

What is measurement ?...

mariarad [96]

Answer:

the size, length, or amount of something, as established by measuring.

3 0

2 years ago

Read 2 more answers

Velocity of an object of mass 5 kg increases from 3 m/s to 7 m/s on applying a force continuously for 2 s. Find out the force ap

Alenkasestr [34]

Answer:

Force=10N

Velocity=13m/s

Explanation:

Given,

Mass = 5kg

initial velocity=3m/s

Final velocity=7m/s

Time=2s

Now acceleration= v-u/t

=7-3/2

=4/2

=2m/s²

So, acceleration=2m/s²

Now,

F=ma

=5*2

=10N

7 0

3 years ago

A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up. Which law would tha

atroni [7]

The first law

In Newtons first law it states that an object will not change its motion unless a force acts upon it.

5 0

3 years ago