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timurjin [86]
3 years ago
14

A batter hits two baseballs with the same force. One hits the ground near third base. The other is a home run out of the park. W

here was there more work done? Explain your answer.
The ball that went out of the park shows more work because the force applied was greater.

The ball that hit near third base shows more work because it hit the ground much harder.

The ball that went out of the park shows more work because the distance was greater.

The ball that hit near third base shows more work because the force applied was greater.
Physics
1 answer:
Basile [38]3 years ago
3 0
I think the answer is "<span>The ball that went out of the park shows more work because the distance was greater."</span>
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using a lever to move a rock reduces the force a person must exert. what does it do to the work the person must do?
morpeh [17]

Using a lever to move a rock reduces the force a person must exert . It also reduces the work (effort ) the person must do.

Using a lever decreases the input force required to lift up the load, for example if a force of 900N is required to lift the load without a lever . Using the lever the input force decreases to 500N and as we all know by the formulae of work done :

Work done ∝  force applied

By this equation we can conclude that if the force to be applied on the load reduces by the use of a lever therefore the work to be done on the load will also reduce .

You can get a additional information about the lever system below :

brainly.com/question/3522307

#SPJ4

3 0
2 years ago
Consider an eraser, weighing 20g, sitting 5cm from the center of a turntable (flat disk attached to a motor which can spin the d
Artist 52 [7]

Answer:

A. 42.3 revolution per minute

B. Centripetal Force

Explanation:

20 g = 0.02 kg

5 cm = 0.05 m

Let g = 9.8 m/s2

A.The friction force acting on the eraser is the product of normal force and its coefficient:

F_f = N\mu = mg\mu = 0.02*9.8*0.1 = 0.0196 N

For the eraser to begin slipping, its centripetal acceleration must win over the acceleration created by friction force, which is

a_f = F_f / m = 0.0196 / 0.02 = 0.98 m/s^2 = a_c

We can calculate the angular velocity from this:

a_c = \omega^2 r

where r = 0.05 is the radius of rotation, which is distance from the center to the eraser

\omega^2 = a_c/r = 0.98 / 0.05 = 19.6

\omega = \sqrt{19.6} = 4.43 rad/s

If it spins and angle of 4.43 rad per second then for every minute (60 seconds) it would spin an angle of 4.43 * 60 = 265.6 rad/min

Since 1 revolution is 2π rad, then in a minute it would spin 265.6 / 2π = 42.3 revolution/minute

B. The force responsible for making the eraser go faster while the turntable is spinning up would be the centripetal force.

7 0
3 years ago
3. Nearsighted people can undergo a medical procedure called keratotomy to produce normal (or at least more-normal) vision. In t
Mademuasel [1]

Answer:

P= -1.83D

Explanation:

Given,

u=-6 m

v=-50 cm = - 0.5 m

the power of the lens

P = 1/f = 1/v = 1/u

P = 1/ -0.50 + 1/6

P = -1.83D

7 0
3 years ago
Which statement is true for two pieces of iron at the same temperature ? A. The total kinetic energy of their particles is equal
statuscvo [17]

The complete options are;

A. The average kinetic energy of their particles is the same.

B. The total kinetic energy of their particles is equal.

C. Heat flows from the larger object to the smaller object.

D. Heat flows from the object with higher potential energy to the object with lower potential energy.

Answer:

Explanation:

From the relationship between average kinetic energy and temperature, we have the formula;

E_k = (3/2)kT

Where;

k is a constant known as boltzmann constant.

T is known as temperature

We can see that at the same temperature (T), kinetic energy will remain the same because from the formula, E_k depends km only the temperature.

Thus, average kinetic energy of their particles saying that.

3 0
3 years ago
ASAP pls need help will give 25 points per person
faltersainse [42]

Explanation:

1. inertia

2.unbalanced?

3.inertia

4.more

5.inertia

6.inertia

7.unbalanced

8 0
3 years ago
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