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3 years ago

Part D

Physics

1 answer:

anygoal [31]3 years ago

5 0

Answer: I didn't see a difference because the large ball's vertical displacement and velocity are the same as the small one's.

Explanation:

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A 65.0 kg diver is 4.90 m above the water, falling at speed of 6.40 m/s. Calculate her kinetic energy as she hits the water. (Ne

mojhsa [17]

Answer:

4452.5 J.

Explanation:

The diver have both kinetic and potential energy.

Ek = 1/2mv² ................. Equation 1

Where Ek = Kinetic Energy of the diver, m = mass of the diver, v = velocity of the diver.

Given: m = 65 kg, v = 6.4 m/s.

Substitute into equation 1

Ek = 1/2(65)(6.4²)

Ek = 1331.2 J.

Also,

Ep = mgh ............................ Equation 2

Where Ep = Potential energy of the diver when its above the water, h = height of the diver above the water, g = acceleration due to gravity.

Given: m = 65 kg, h = 4.9 m, g = 9.8 m/s²

Substitute into equation 2.

Ep = 65(4.9)(9.8)

Ep = 3121.3 J.

Note: When she hits the water, the potential energy is converted to kinetic energy.

E = Ek+Ep

Where E = Kinetic energy of the diver when she hits the water.

E = 1331.2+3121.3

E = 4452.5 J.

3 0

3 years ago

for a moving object distance covered by it is always greater than or equal to the displacement of the object in a given time. ex

AleksandrR [38]

<h3><u>Answer</u></h3>

Distance is equal to the Total Distance covered by a body, from the initial till the final point $.$

Displacement is equal to the shortest distance between two points.

So we known that Distance can only be equal to or greater than the displacement and can never be shorter than the displacement.

This is just common sense how can anything be shorter than the shortest path itself. But it can be equal to the shortest path

☯ Distance is a scalar quantity and has only magnitude but no direction.

☯ Displacement is a vector quantity and has both magnitude and direction.

☯ Distance can only have +ve values whereas displacement can be +ve, -ve or even be zero.

6 0

3 years ago

What is the Alternative Name for responding varible

Luda [366]

Dependent Variable=Responding Variable.

6 0

3 years ago

A bicycle-cab driver takes two customers across the park. The driver exerts a constant force of 1,400 Newtons as he pedals the c

seraphim [82]

Power is the work performed divided by time in seconds. The work is the force times distance:
$W=Fd=1400*200=280000J$

the time in seconds is 60*11+30=690s so the power is

$P=\frac{280000J }{690s}=405.8W$

So choice B

4 0

3 years ago

Electrons are (2 points)

ddd [48]

<span>electrons are able to move from one atom to another; the atom that loses an electron becomes positively charged and the atom that gains an electron becomes negatively charged.</span>

3 0

4 years ago

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