PHYSICS HIGH SCHOOL

A force is applied to a block, causing it to accelerate along a horizontal, frictionless surface. The kinetic energy gained by the block is equal to which of the following

Answers

Answer 1

Answer:

Answer:

The work done to the block

See

Workdone is Force×Displacement .

Also work done is total mechanical energy of body

As potential energy is 0

Mechanical energy=Kinetic energy

So option C is correct

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A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of 2 newtons. What is the acceleration of the wagon?

Answers

$F=ma$
where:
F - force
m - mass
a - acceleration

We transform this formula to get a:
$a= (F)/(m)$
$a=(2)/(10)(N)/(kg)=0.2(m)/(s^(2))$

Answer:

the Correct answer is 0.2

Explanation:

What is energy from the vibration and movement of the atoms and molecules within substances?a. nuclear energy
b. potential energy
c. radiant energy
d. thermal energy

Answers

The answer is D, thermal energy.

Suppose a yo-yo has a center shaft that has a 0.230 cm radius and that its string is being pulled.(a) If the string is stationary and the yo-yo accelerates away from it at a rate of 1.80 m/s2, what is the angular acceleration of the yo-yo in rad/s2? rad/s2.
(b) What is the angular velocity in rad/s after 0.750 s if it starts from rest? rad/s.
(c) The outside radius of the yo-yo is 3.10 cm.What is the tangential acceleration in m/s2 of a point on its edge? m/s2

Answers

Answer:

Part a)

$\alpha = 782.6 rad/s^2$

Part B)

$\omega = 587 rad/s$

Part c)

$a_t = 24.3 m/s^2$

Explanation:

Part a)

As we know that

$a = R \alpha$

so we will have

$a = 1.80 m/s^2$

$R = 0.230 cm$

$\alpha = (a)/(R)$

$\alpha = (1.80)/(0.230 * 10^(-2))$

$\alpha = 782.6 rad/s^2$

Part B)

Angular speed of the yo-yo

$\omega = \alpha t$

so we have

$\omega = 782.6 * 0.750$

$\omega = 587 rad/s$

Part c)

Tangential acceleration is given as

$a_t = R \alpha$

$a_t = (3.10 * 10^(-2))(782.6)$

$a_t = 24.3 m/s^2$

Describe two of Tesla's inventions that influenced
technology and are still in use today.

Answers

The remote control, and wireless transmissions

Answer:

Tesla perfected alternating current (AC) technology, which now provides electricity to all homes and appliances. He developed the fluorescent lightbulb, which is energy-efficient and cost-effective. The electric motor, which he invented, now powers appliances, machines, tools, and some cars. Tesla also built a hydroelectric power plant to generate electricity from the force of water. Tesla also studied X-rays, radios, and wireless technology.

Explanation:

i just answered it this is the sample response believe me edge 2021

You check a barometer and observe that the air pressure has been dropping all day. Is tonight's weather more likely to be calm or stormy?

Answers

If you had been checking the barometer and observe that the air pressure has been dropping all day, tonight's weather more likely to be stormy. Stormy weathers have low pressure climate

When light passes through an object unchanged scientists call that process