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2 years ago

A car starting from rest has a constant acceleration of 4 meters per second per second. How fast will it be going in 5 seconds?

Physics

1 answer:

irinina [24]2 years ago

4 0

Answer:

18 m

Explanation:

Given : vo = 0 m/s ; t = 3 s; a = 4 m/s^2 ; d = ? m ; average velocity = ? m/s ; fonal velocity = ? m/s

solving for the final velocity, v

v = a * t

v = 4 m/s^2 * 3 s

v = 12 m / s

Solving for the average velocity. avg v

avg v = (vo + v) / 2

avg v = (0 m / s + 12 m/s) / 2

avg v = 6 m / s

Solving for the distance traveled after 3 s

d = avg v * t

d = 6 m / s * 3 s

d = 18 meters

In the first 3s the car travels 18 meters.

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Answer:

Explanation:

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2 years ago

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Answer:

Explanation:

Given

coefficient of kinetic friction $(\mu _k)$ =0.34

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weight of block=51 N

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thus

$Fsin\theta -W-f_r=0$

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$F\left ( \sin \theta -\mu \cos \theta \right )=W$

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(b)When Block slides down the wall friction changes its direction to oppose the block

$Fsin\theta -W+f_r=0$

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3 years ago

If earth had no atmosphere would a falling object ever reach terminal velocity

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2 years ago

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bogdanovich [222]

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2 years ago

A rocket sled accelerates from 10 m/s to 40 m/s in 2 seconds. What is the average acceleration of the sled?

Andreas93 [3]

Answer:

15m/s²

Explanation:

Given parameters:

Initial velocity = 10m/s

Final velocity = 40m/s

Time taken = 2s

Unknown:

Average acceleration = ?

Solution:

Acceleration is the rate of change of velocity with time;

Acceleration = $\frac{Final velocity - Initial velocity }{time}$

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