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GaryK [48]
2 years ago
8

Determine whether each object has potential energy, kinetic energy, or both

Physics
1 answer:
Pepsi [2]2 years ago
4 0

Answer:

  1. stretched spring has potential energy
  2. a falling skydiver has kinetic energy
  3. a gallob of gasoline has potential energy
  4. rotating flywheel in a car in a car engine has kinetic energy
  5. a swinging wrecking ball has kinetic energy
  6. skier on a mountaintop has both

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An electron moves in a circle of radius r = 4.52 × 10-11 m with a speed 2.80 × 106 m/s. Treat the circular path as a current loo
hodyreva [135]

Answer:

T= 633.51 x 10⁻²⁸ N.m

Explanation:

Given that

r= 4.52 x 10⁻¹¹ m

v= 2.8 x 10⁶ m/s

B= 6.29 mT

We know that charge on electron Q

Q= 1.6 x 10⁻¹⁹ C

The time period t

t=2πr / v

Now by putting the values

t=(2 x π x 4.52 x 10⁻¹¹ ) / (2.80 x  10⁶)

t= 10.13 x 10⁻¹⁷ s

So current I

I = Q/t

I=(1.6 x 10⁻¹⁹)/(10.13 x 10⁻¹⁷)

I= 1.57 mA

The torque T given as

T = I A B

A= π x (4.52 x 10⁻¹¹) ²  m²

A= 64.15 x 10⁻²² m²

T = I A B

T =  1.57 x 10⁻³ x  64.15 x 10⁻²² x 6.29 x 10⁻³ M.m

T= 633.51 x 10⁻²⁸ N.m

7 0
3 years ago
A mover pushes a 46.0kg crate 10.3m across a rough floor without acceleration. How much work did the mover do (horizontally) pus
Alchen [17]

Answer:

<h3>2,321.62Joules</h3>

Explanation:

The formula for calculating workdone is expressed as;

Workdone = Force * Distance

Get the force

F = nR

n is the coefficient of friction = 0.5

R is the reaction = mg

R = 46 ( 9.8)

R = 450.8N

F = 0.5 * 450.8

F = 225.4N

Distance = 10.3m

Get the workdone

Workdone = 225.4 * 10.3

Workdone  = 2,321.62Joules

<em>Hence the amount of work done is 2,321.62Joules</em>

3 0
3 years ago
Examples for inertia
Lerok [7]

One's body movement to the side when a car makes a sharp turn.

Tightening of seat belts in a car when it stops quickly.

A ball rolling down a hill will continue to roll unless friction or another force stops it.

Men in space find it more difficult to stop moving because of a lack of gravity acting against them.

6 0
4 years ago
What units are used to measure force
Nastasia [14]
N, or Neutons are a common way to measure force
5 0
4 years ago
Read 2 more answers
A 2.80 kg mass is dropped from a
inn [45]

Answer:

PE = 82.32J

Explanation:

PE = m*g*h

PE = 2.80kg*9.8m/s²*3m

PE = 82.32J

7 0
3 years ago
Read 2 more answers
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