3 years ago

41 What is the net force acting on a 1:0-kg ball moving at a constant velocity?

Physics

1 answer:

givi [52]3 years ago

7 0

Answer:

0 N

Explanation:

According to Newton's second law, the net force is the mass times the acceleration.

∑F = ma

At constant velocity, the acceleration is 0. So the net force is 0.

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3 years ago

If forces acting on an object are unbalanced, which factor may result from an unbalanced force? A.The net force is negative. B.T

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How much time does it take a rhino running at 40 m/s to run 250 m?

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3 years ago

A jogger hears a car alarm and decides to investigate. While running toward the car, she hears an alarm frequency of 872.10 Hz.

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Answer:

v = 4.18 m/s

Explanation:

given,

frequency of the alarm = 872.10 Hz

after passing car frequency she hear = 851.10 Hz

Speed of sound = 343 m/s

speed of the jogger = ?

speed of the

$v_f = \dfrac{872.10-851.10}{2}$

$v_f =10.5\ Hz$

v_o = 872.1 - 10.5

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$v = \dfrac{v_1 \times 343}{v_0}-343$

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3 years ago

A 4.0-kg object has 72 J of kinetic energy.<br> Determine its speed.

Svetlanka [38]

Answer:

6m/s

Explanation:

v = sqrt of 2KE/m

Where:

KE = kinetic energy

m = mass of a body

v = velocity of a body

= sqrt of 2(72)/4

= sqrt of 144/4

= sqrt of 36

= 6m/s

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2 years ago