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jasenka [17]
3 years ago
11

A 1,600 kg car is traveling with a speed of 20 m/s. Find the net force that is required to bring the car to a halt in a distance

of 50m. Use the formula: a= (vf2-vi2)/2d regarding the relation among acceleration a, final velocity vf, initial velocity vi, and the traveled distance of an object d.
Physics
2 answers:
Pie3 years ago
4 0
256N. I love physics so.... yerp
Aleksandr [31]3 years ago
3 0

Net force that is required to bring the car to a halt =6400 N

Explanation:

Using kinematic equation to calculate the acceleration a

Vf²= Vi²+ 2 a d

Vf= final velocity=0

Vi= initial velocity= 20 m/s

a= acceleration

d= distance=50 m

0²= (20)²+ 2 a (50)

a=-4 m/s²

Now force= F = ma

m= mass= 1600 kg

F= 1600 (-4)

F=-6400 N

negative sign indicates that the force is opposing the motion of the car.

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Answer:

4 seconds

Explanation:

The frequency of a body is the number of oscillations in one second. It is the number of cycles per unit time. The S.I unit of frequency is the Hertz (Hz).

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A body oscillates with 25hz. Therefore the frequency (f) = 25 Hz.

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