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lubasha [3.4K]
3 years ago
11

Can someone please help me? If somebody pushes a cart with 4N of force and the cart moves a distance of 2 meters, how much work

did they do?
Physics
1 answer:
sergeinik [125]3 years ago
7 0

Answer:

Work done, W = 8 J

Explanation:

We have,

Force acting on the cart is 4 N

Cart covers a distance of 2 m

We need to find the work done by the cart. Work done by an object is given in terms of force and displacement. It can be given by :

W=Fd\\\\W=4\ N\times 2\ m\\\\W=8\ J

So, the work done by the cart is 8 J.

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Calculate the kinetic energy of a 64.g bullet moving at a speed of 411.ms . Round your answer to 2 significant digits.
Mandarinka [93]

Answer:

The kinetic energy of the bullet is 5.4 × 10³ J

Explanation:

Hi there!

The equation of kinetic energy is the following:

KE = 1/2 · m · v²

Where:

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v = speed of the bullet.

Let´s convert the mass unit to kg so that our result is in Joules:

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3 years ago
Does sunlight really take 8 minutes to reach your eyes?
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Vanyuwa [196]
I’ve done this before the answer is B
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1 year ago
Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 n, and it doesn't budge. what is
maks197457 [2]

Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 N, and it doesn't budge. The magnitude of the friction force on the crate in Newton is 400N

This is due to Friction force, which is defined as the resisting force that acts on a body when it is at rest (Static friction) or when it is in motion (Kinetic friction).

When a force is applied on a stationary body, the force of static friction starts to act on the body which prevents any relative motion between the object and surface. The magnitude of friction increases up to μsN, where μs is the coefficient of static friction. As the crate didn't budge, it means the amount of force applied was less than μsN. Hence the force applied was canceled by an equal and opposite amount of frictional force which was equal to 400N.

Learn more about frictional force here

brainly.com/question/1714663

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1 year ago
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