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3 years ago

Pick the right answer

Physics

1 answer:

Alex777 [14]3 years ago

8 0

I agree with Todd. One time when we went to the beach this happened and the waves brought back the ball so…

:) (can you mark me brainliest?)

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An antelope moving with constant acceleration of 2m/s2 covers crosses a point where its velocity is 5m/s. After 6s how much dist

LuckyWell [14K]

The distance covered is 66 m and the velocity would be 17 m/s

<h3>What are the three equations of motion?</h3>

There are three equations of motion given by Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

As given in the problem, An antelope moving with a constant acceleration of 2m/s2 covers crosses a point where its velocity is 5m/s

distance =? meters

initial velocity(u) = 5 m/s

acceleration(a) = 2 m/s²

By using the second equation of motion given by newton

S = ut + 1/2at²

u= 5 m/s , a= 2 m/s² and t =6 seconds

S = 5*6 +0.5*2*6²

=66 m

to calculate the velocity after 6 seconds by using the first question of the motion

v = u + at

v = 5 + 2*6

v = 17 m/s

Thus, the distance covered is 66 m and the velocity would be 17 m/s

Learn more about equations of motion from here

brainly.com/question/5955789

#SPJ1

6 0

1 year ago

A 59.3 kg diver jumps off a board

ser-zykov [4K]

The board is 2.50m high.

Why?

We can calculate how high was the board applying the Law of Conservation of Mechanical Energy. This Law states that the mechanical energy (kinematic and potential) will be conserved during the motion.

It can be described with the following formula:

$E_{M_{1}}=E_{M_{2}}\\\\PE_{1}+KE_{1}=PE_{2}+KE_{2}$

$PE=m*g*h\\KE=\frac{1}{2}m*v^{2}$

At the top of the boar, the kinetic energy is equal to 0.

At the water, the potential energy is equal to 0.

So,

$PE_{1}=KE_{2}\\\\m*g*h=1450J\\\\59.3kg*9.8\frac{m}{s^{2}}*h=1450J\\ \\h=\frac{1450J}{59.3kg*9.8\frac{m}{s^{2}}}=2.50m$

Hence, we have that the board is 2.50m high.

Have a nice day!

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4 years ago

Lab: Energy Transfer Instructions Click the links to open the resources below. These resources will help you complete the assign

svetoff [14.1K]

Answer:

Give me a 5 star

Explanation:

Because im cool

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3 years ago

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Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. The wavelength changes from 2 m in the air

Nata [24]

The frequency of a sound is whatever frequency leaves the source. It doesn't change.

Voiced of swimmers at the pool don't change frequency in or out of the water. Only their speed and wavelength change.

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3 years ago

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Explain the following observation referring to the appropriate process of heat transfer in each case

tigry1 [53]

If the two cups are the same/equal in all regards the spoon makes the difference in heat loss. Metal spoon is a good conductor, heat conducts up the spoon handle. Radiant and convection losses occur in the surrounding air. Metal becomes a “heat sink”.

Spoon will feel warmer to the touch than a pottery or foam cup that is not a good conductor.

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3 years ago