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Ipatiy [6.2K]
3 years ago
10

A dog is pulling a sled by applying a force of 75 newtons on it. The angle of force from the ground is 45°. If the sled moves 15

meters, how much work is done by the dog on the sled?
Physics
1 answer:
Kitty [74]3 years ago
4 0
Work done = force x distance (where the force is in the direction of the distance travelled)
We must resolve the force so that it is horizontal to the ground
force = 75cos45
Then simply plug into the formula, so:
work done = 75cos45 x 15 = 795.49... Nm = 795 Nm (3 sig. fig.)

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The speed of the sound in the xenon is 178 m/s. And the right option is b 178 m/s

<h3 /><h3>What is speed?</h3>

Speed can be defined as the ratio of the total distance traveled by a body to the total time taken.

To calculate the speed of the sound in the xenon, we use the formula below.

Formula:

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Where:

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From the question,

Given:

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Substitute the values above into equation 1

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The distance Rickey slides across the ground before touching the base is 15.825 m

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