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3 years ago

What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s?

Physics

1 answer:

Lesechka [4]3 years ago

8 0

Ke=1/2mv^2
Ke= 0.5*30*20^2
Ke= 6000joules

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3 years ago

What best describes the dropping height of a ball that bounced back up to a height of 45 centimeters?

murzikaleks [220]

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3 years ago

What happens to the magnitude of the gravitational force as the distance between two bodies increase?

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Answer:

The magnitude of the force will decrease

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where

G is the gravitational constant

m1 is the mass of the first object

m2 is the mass of the second object

r is the separation between the objects

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3 years ago

Assume that the stopping distance of a van varies directly with the square of the speed. A van traveling 40 miles per hour can s

Daniel [21]

Answer:

d = 100.8 ft

Explanation:

As we know that initial speed of the van is 40 miles then the stopping distance is given as 70 feet

here we know that

$v_f^2 - v_i^2 = 2 ad$

so here we have

$0^2 - 40^2 = 2 a (70 feet)$

now again if the speed is increased to 48 mph then let say the stopping distance is "d"

so we will have

$0^2 - 48^2 = 2 a (d)$

now divide the above two equations

$\frac{40^2}{48^2} = \frac{70 feet}{d}$

$d = 100.8 ft$

4 0

3 years ago