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Alika [10]
3 years ago
8

A ball is rolling a 5 m/s down a hill the ball has 20 J of energy what is the mass of the ball

Physics
1 answer:
Dmitriy789 [7]3 years ago
7 0

Its 1.6 kg

Remember

E = 1/2mv^2 is the kinetic energy of the ball. The energy is given to you so you need to solve for mass. Rearranging the equation gives you 2E/v^2 = 1.6

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Temka [501]

Answer:

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Explanation:

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2 years ago
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An object that is dropped straight down from a height of 100 m has a vertical change in position that is less than that of an id
sergey [27]
Objects dropped straight or thrown horizontally from the same height
change their vertical velocity at the same rate, and fall through equal
vertical distances in equal time intervals.

The statement is false. 
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3 years ago
A box slides to the right along a horizontal surface which is true about the friction force
mixer [17]

Answer:

It is a force in the direction of the motion that allows the box to move

Explanation:

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How heat is conducted along a metal bar?
nikdorinn [45]

Answer:

If one end of a metal bar is heated, the atoms at that end vibrate more than the atoms at the cold end. The vibration spreads along the bar from atom to atom.

Explanation:

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3 0
3 years ago
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You place a 55.0 kg box on a track that makes an angle of 28.0 degrees with the horizontal. The coefficient of static friction b
Radda [10]

Answer:

\theta=34 \textdegree

Explanation:

From the question we are told that:

Mass m=55kg

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Generally, the equation for Newtons second Law is mathematically given by

For

\sum_y=0

N=mgcos \theta

for

\sum_x=0

F_{s}=mgsin\theta

Where

F_{s}=\alpha*N\\\\F_{s}=\alpha*m*gcos \theta

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Therefore

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\theta=34 \textdegree

6 0
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