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2 years ago

PLEASE HELP WITH THESE WILL GIVE BRAINLEIST

Physics

2 answers:

nikitadnepr [17]2 years ago

6 0

Answer:

When you rub your hands together, the action of scraping the

surface of your skin back and forth against each other causes

the molecules in your skin to move a little faster. The faster

that molecules move, the higher the temperature. So the

friction of rubbing your hands together makes them feel

warmer.

The force is friction. It's a force that opposes motion. It is present whenever two surfaces rub over each other, such as when you rub your hands together, or when you apply the brakes on a bike or in a car.

Explanation: I hope this helped you!

Sedaia [141]2 years ago

5 0

Answer: type of force is friction

Explanation:

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Answer:

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Explanation:

Given that

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Now by putting the values

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We know that (if acceleration is constant)

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Explanation:

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A shell is fired at an angle of 35° above the horizontal at a velocity of 40 m/s. (a) What is it's speed at the highest point of

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Answer:

Part a)

$v_f = v_x = 32.77 m/s$

Part b)

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Explanation:

Part a)

Shell is fired at speed of 40 m/s at angle of 35 degree

so here we have

$v_x = 40 cos35 = 32.77 m/s$

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since gravity act opposite to vertical speed of the shell so at the highest point of its trajectory the vertical component of the speed will become zero

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Part b)

After completing the motion we know that the displacement of the object will be zero in Y direction

so we have

$\Delta y = 0$

$0 = v_y t - \frac{1}{2}gt^2$

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Answer:

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