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Fittoniya [83]
3 years ago
15

A block and a ball have the same mass and move with the same initial velocity across a floor and then encounter identical ramps.

The block slides without friction and the ball rolls without slipping.
Which one makes it furthest up the ramp?

a) Block
b) Ball
c) Both reach the same height.
Physics
1 answer:
Makovka662 [10]3 years ago
5 0

Answer:

b) Ball

Explanation:

The block is sliding and ball is rolling . Ball have greater energy as it has both linear kinetic energy and rotational kinetic energy . So it will have additional rotational energy as the linear kinetic energy of both of them will be equal because linear velocity of both are equal.

As ball has greater total kinetic energy , height attained by it will be greater on the ramp

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Answer:

5 hours

Explanation:

Let the required time be x hours. The time will be the same for both cars.

The cars will cover different distances because they are travelling at different speeds.

<em>D=S×T </em>

The distance travelled by the slower car = 50×x miles.

The distance travelled by the faster car = 58×x miles.

The two distances differ by 40 miles.

58x−50x=40

8x=40

x=5 hours

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A second method:

The difference in the distances is 40 miles

The difference in the speeds is #8mph.

The time to make up the 40 miles= \frac{40}{8}=5 hours

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ki77a [65]

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point b

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Once potential energy is lost on a roller coaster it cannot be gained all the way back true or false
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true

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zaharov [31]

Answer:

Use of telemetry and radar astronomy

Explanation:

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A standard radar pulse of known speed is sent to the Sun, and the time with which it takes to return is measured,  once this is recorded, the distance between the Earth and the Sun can be calculated using

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