Ask question

Ask question

All categories

3 years ago

11

write at least 5 sentences answering the question, "How does the height of a ramp affect the speed of an object rolling down tha

t ramp?"

1 answer:

Salsk061 [2.6K]3 years ago

7 0

Answer:

i dont care bout nunnadt shi

Explanation:

You might be interested in

Lulu gets a flat tire on her way to school. She gets out and attempts to push the car. For 60 minutes, she pushes and

Virty [35]

Answer:

none.

Explanation:

Work is only accomplished if there is a change in position.

8 0

3 years ago

What are the different types of Energy transformations and Energy Transfers?

Harman [31]

Explanation:

Here are some of the ways that energy can change (transform) from one type to another:

The Sun transforms nuclear energy into heat and light energy.

Our bodies convert chemical energy in our food into mechanical energy for us to move.

An electric fan transforms electrical energy into kinetic energy.

7 0

4 years ago

The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particl

Lyrx [107]

Answer:

a) F = 21.16 N, b) a = 3.17 10²⁸ m / s

Explanation:

a) The outside between the alpha particles is the electric force, given by Coulomb's law

F = $k \frac{ q_1 q_2}{r^2}$

in that case the two charges are of equal magnitude

q₁ = q₂ = 2q

let's calculate

F = $9 \ 10^9 \ \frac{ (2 \ 1.6 \ 10^{-19} )^2 }{ (6.60 \ 10^{-15} )^2 }$

F = 21.16 N

this force is repulsive because the charges are of the same sign

b) what is the initial acceleration

F = ma

a = F / m

a = $\frac{21.16}{4.0026 \ 1.67 \ 10^{-27} }$ 21.16 / 4.0025 1.67 10-27

a = 3.17 10²⁸ m / s

this acceleration is in the direction of moving away the alpha particles

7 0

3 years ago

A bob of mass of 0.18 kilograms is released from a height of 45 meters above the ground level. What is the value of the kinetic

il63 [147K]

I think the best answer is b

4 0

4 years ago

Read 2 more answers

Q4. Consider the skier on a slope shown in the figure below. Her mass including equipment is 55.0 kg.

Shkiper50 [21]

Answer:

Part a)

When there is no friction then acceleration is

$a = 4.14 m/s^2$

Part b)

if there is friction force along the inclined then acceleration is

$a = 3.33 m/s^2$

Explanation:

Part a)

As we know that the skier is on inclined plane

So here if there is no friction then net force along the inclined plane is given as

$F = mg sin\theta$

now acceleration of the skier is given as

$a = \frac{F}{m}$

$a = g sin\theta$

$a = 9.81(sin25)$

$a = 4.14 m/s^2$

Part b)

if there is friction force along the inclined then net force along the inclined plane is given as

$F = mg sin\theta - F_f$

now acceleration of the skier is given as

$a = \frac{F}{m}$

$a = g sin\theta - \frac{F_f}{m}$

$a = 9.81(sin25) - \frac{45}{55}$

$a = 3.33 m/s^2$

5 0

4 years ago