All categories

4 years ago

A 62 kg box is lifted 12 meters off the ground. How much work was done?

Physics

2 answers:

victus00 [196]4 years ago

7 0

Answer: 7.3 kJ

Explanation:

Work = gravitational potential energy

Amount of work done to lift the box off the ground is stored in the form gravitational potential energy.

W = m g h

where m is the mass = 62 kg

g is the acceleration due to gravity = 9.81 m/s²

h is the height = 12 m

W = 62 kg × 9.81 m/s² × 12 m = 7298. 6 J = 7.3 kJ

OleMash [197]4 years ago

6 0

7291.2 I hope this is right

You might be interested in

Power is equal to voltage multiplied by current. Add the missing information in each of the following power equations. P = V P =

butalik [34]

P = V × I
P = R × I^2
P = V^2/R

6 0

4 years ago

Force F = − + ( 8.00 N i 6.00 N j ) ( ) acts on a particle with position vector r = + (3.00 m i 4.00 m j ) ( ) .

jek_recluse [69]

Explanation:

Given that,

Force, $F=((-8i)+6j)\ N$

Position of the particle, $r=(3i+4j)\ m$

(a) The toque on a particle about the origin is given by :

$\tau=F\times r$

$\tau=((-8i)+6j) \times (3i+4j)$

Taking the cross product of above two vectors, we get the value of torque as :

$\tau=(0+0-50k)\ N-m$

(b) Let $\theta$ is the angle between r and F. The angle between two vectors is given by :

$cos\theta=\dfrac{r.F}{|r|.|F|}$

$cos\theta=\dfrac{(3i+4j).((-8i)+6j)}{(\sqrt{3^2+4^2} ).(\sqrt{8^2+6^2}) }$

$cos\theta=\dfrac{0}{50}$

$\theta=90^{\circ}$

6 0

3 years ago

PLEASE I'M GOING TO FAIL HELPPPP

BaLLatris [955]

I think the answer is E

4 0

3 years ago

An electron traveling at a velocity v enters a uniform magnetic field B. Initially, the velocity and field are perpendicular to

Brut [27]

If the electron goes a distance d, the amount of work done on it by the magnetic field is zero.

Because magnetic force acts perpendicular to the direction of motion, it has no effect on any moving charge particle. As a result, speed won't change.

<h3>What is Magnetic field?</h3>

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field.
A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field.
A compass, a motor, the magnets that hold items in refrigerators, railroad tracks, and modern roller coasters are examples of devices that use magnetic force.
A magnetic field is created by all moving charges, and any charges that move across its regions are subject to a force.

Learn more about Magnetic field here:

brainly.com/question/14848188

#SPJ4

6 0

2 years ago

What are the different types of precipitation

nikitadnepr [17]

There are many different types of precipitation —rain, snow, hail, and sleet for example—yet they all have a few things in common. They all come from clouds. They are all forms of water that fall from the sky.

8 0

3 years ago