All categories

3 years ago

Which of the objects have only potential energy?

Physics

1 answer:

vitfil [10]3 years ago

4 0

Answer:

A raised weight.

Water that is behind a dam.

A car that is parked at the top of a hill.

A yoyo before it is released.

River water at the top of a waterfall.

A book on a table before it falls.

A child at the top of a slide.

Ripe fruit before it falls.

Explanation:

You might be interested in

A parallel plate capacitor can store

Norma-Jean [14]

A parallel plate capacitor can store electric charge and
electrical energy, and if the plates are far enough apart,
you can store your lunch in there too.

3 0

3 years ago

Read 2 more answers

Help and explain please

babunello [35]

Answer: a) Moment = 200N.m

b) F = 500N

Explanation: Moment or Torque is the tendency of a body to rotate because of an aplplied force. It can be calculated as

$\tau = F.r.sin\theta$

F is force applied

r is distance from the force to the point of rotation

θ is the angle formed between force and distance

a) Since F and r are perpendicular, θ=90°, sin90° = 1, so

$\tau=F.r$

$\tau=100(2)$

$\tau=$ 200

Torque caused by weight of the barrier at the pivot is 200N.m

b) Counterweight has the same torque as pivot: $\tau=$ 200

So, to find Force necessary to balance the weight:

$\tau=F.r$

$F=\frac{\tau}{r}$

$F=\frac{200}{0.4}$

F = 500

It is necessary a force of 500N from the counterweight to balance the weight.

4 0

3 years ago

The sudden drain of a magma chamber can form a caldera. True False

Sladkaya [172]

Maybe true not sure......?

6 0

3 years ago

Read 2 more answers

Do solids flow and how do they do that

Eva8 [605]

Answer:

solids cannot flow because the molecules a held tightly together

7 0

3 years ago

Read 2 more answers

How do black holes loose energy when they orbit each other in binary?

nikdorinn [45]

They give off gravitational waves

5 0

4 years ago