Ask question

Ask question

All categories

2 years ago

15

a 20 kg projectile is launched from a cannon. a. if the projectile leaves the cannon with a velocity of 54 m/s, what is the work

done by the cannon to launch it? 12mv2

1 answer:

Artyom0805 [142]2 years ago

7 0

Answer:

KE = 1/2 M v^2 kinetic energy of projectile

KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile

W = 10 * 54^2 = work done on projectile

W = 29,160 J

You might be interested in

When we look up in the sky the Sun appears about as big as the moon; however, we know that the Sun is much further away. Given t

Nady [450]

Answer: well since you can fit one million Earths in the sun just multiply.

hope this helps happy thanksgiving ;)

8 0

3 years ago

Calculate the force, when a object acelerattes to 30 m/s^2 and have a mass of 40 kg

faust18 [17]

Hello!

Use the <u>second law of Newton:</u>

F = ma

Replacing:

F = 40 kg * 30 m/s^2

Resolving:

F = 1200 N

The force is <u>1200 Newtons.</u>

3 0

3 years ago

Read 2 more answers

Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°. The sheet has parallel faces and the glass h

xxMikexx [17]

Answer:

30.81°

Explanation:

θ₁ = angle of incidence = 50°

θ₂ = Angle of refraction

n₂ = Refractive index of glass = 1.5

n₁ = Refractive index of air = 1.0003

From Snell's Law

Using Snell's law as:

$n_1\times {sin\theta_1}={n_2}\times{sin\theta_2}$

$1.0003\times {sin50}={1.50}\times{sin\theta_2}$

Angle of refraction= sin⁻¹ 0.5122 = 30.81°.

3 0

4 years ago

How does the principle of moments affect the couple in physics

ivanzaharov [21]

When you push a door closed it doesn't travel in a straight line it turns around the hinges this is an example of a line

3 0

3 years ago

If two connected points objects pass through the same set of three points, the shapes created by each will be identical, regardl

djverab [1.8K]

Answer:

True

Explanation:

It Depends on the order in which each object was plotted, if two connected points objects pass through the same set of three points, the shapes created by each point may be different

7 0

3 years ago