2 years ago

Can someone plz answere my question for science

Physics

1 answer:

klio [65]2 years ago

5 0

Whats the question?
djdkkd

You might be interested in

A gymnast is swinging on a high bar. The distance between his waist and the bar is 0.905 m, as the drawing shows. At the top of

Citrus2011 [14]

Answer:

5.959 m/s

Explanation:

m = Mass of gymnast

u = Initial velocity

v = Final velocity

$h_i$ = Initial height

$h_f$ = Final height

From conservation of Energy

$\frac{1}{2}mv^2+mgh_f=\frac{1}{2}mu^2+mgh_i\\\Rightarrow\frac{1}{2}mv^2+mg0=\frac{1}{2}m0^2+mgh_i\\\Rightarrow \frac{1}{2}mv^2=mgh_i\\\Rightarrow v=\sqrt{2gh_i}$

$h_i=2r$

$v=\sqrt{4gr}\\\Rightarrow v=\sqrt{4\times 9.81\times 0.905}\\\Rightarrow v=5.959\ m/s$

Velocity of gymnast at bottom of swing is 5.959 m/s

5 0

3 years ago

A car speeds up from 13 m/s to 23 m/s in 30 seconds. What is the

Lapatulllka [165]

acceleration of the car = 0.33 m/s²

Explanation:

To calculate the acceleration of the car we use the following formula:

acceleration = change in velocity / time

change in velocity = final velocity - initial velocity

change in velocity = 23 m/s - 13 m/s = 10 m/s

change in velocity = 10 m/s

acceleration = 10 m/s / 30 s

acceleration = 0.33 m/s²

Learn more about:

acceleration

brainly.com/question/4134594

brainly.com/question/1213762

#learnwithBrainly

8 0

3 years ago

Can an object have both kinetic energy and gravitational potential energy? Explain.

marin [14]

Energy flows with kinetic energy

8 0

2 years ago

Explain that a universe is a large collection of billions of galaxies and is expanding continuously?

pychu [463]

It is the effect of the Big Bang and dark energy.

4 0

3 years ago

Read 2 more answers

The specific heat capacity of aluminum is 0.22 cal/g°C. How much energy needs to flow into 20.0 grams of aluminum to change its

Leokris [45]

Its C. 66 cal , that's your answer to your question.

3 0

3 years ago

Read 2 more answers