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3 years ago

If the speed of an object doubles its kinetic energy does what

2 answers:

6 0

If the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy. Hope it help!

Novosadov [1.4K]3 years ago

6 0

Explanation:

The mathematical expression for the kinetic energy is given by :

$E_k=\dfrac{1}{2}mv^2$

Where

m is the mass of the object

v is the velocity with which the object is moving

According to given condition, if the speed of an object doubles, v' = 2v. So, kinetic energy becomes :

$E_k'=\dfrac{1}{2}m(2v)^2$

$E_k'=4\times \dfrac{1}{2}mv^2$

$E_k'=4\times E_k$

So, if the speed of an object doubles, its kinetic energy becomes four times. Hence, this is the required solution.

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Answer:

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3 years ago

The distance traveled by an object can be modeled by the equation d = ut + 0.5at2 where d = distance, u = initial velocity, t =

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3 years ago

A 25kg chair initially at rest on a horizontal floor requires 165 N force to set it in motion. Once the chair is in motion, a 12

bazaltina [42]

The coefficient of static friction between the chair and the floor is 0.67

Explanation:

Given:

Weight of the chair = 25kg

Force = 165 N (F_applied)

Force = 127 N (F_max)

To find: Coefficient of static friction

The “coefficient of static friction” between a chair and the floor is defined as the ration of maximum force to the normal force acting on the chair

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The F_n is equal to the weight multiplied by its gravity

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3 0

3 years ago

An 80-kgkg quarterback jumps straight up in the air right before throwing a 0.43-kgkg football horizontally at 15 m/sm/s . How f

vladimir1956 [14]

Answer:

V = 0.0806 m/s

Explanation:

given data

mass quarterback = 80 kg

mass football = 0.43 kg

velocity = 15 m/s

solution

we consider here momentum conservation is in horizontal direction.

so that here no initial momentum of the quarterback

so that final momentum of the system will be 0

so we can say

M(quarterback) × V = m(football) × v (football) ........................1

put here value we get

80 × V = 0.43 × 15

V = 0.0806 m/s

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3 years ago

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Anarel [89]

Answer:

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Explanation:

i hope this helps-

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3 years ago

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