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Novosadov [1.4K]
2 years ago
13

2000-kg car decelerated from 10 m/s to 5 m/s. What is the work done on the car ?

Physics
1 answer:
sergey [27]2 years ago
3 0
A 2000-kg car decelerated from 10 m/s to 5 m/s. What is the work done on the car ?

Known :

Car’s mass (m) = 2000 kg

Initial speed (vo) = 10 m/s

Final speed (vt) = 5 m/s

Wanted: net work

Solution :

Net work :

Wnet= ΔEK

Wnet = ½ m (vt2 – vo2)

Wnet = ½ (2000)(52 – 102)

Wnet = (1000)(25 – 100)

Wnet = (1000)(-75)

Wnet = -75,000 Joule

The minus sign indicates that the direction of displacement is opposite with the direction of the net force.
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What could be used as another word for electrical potential
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A 2.31 kg rope is stretched between supports 10.4 m apart. If one end of the rope is tweaked, how long will it take for the resu
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Answer:

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Explanation:

First, let's use the appropiate equations to solve this:

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Where:

V: Speed of the disturbance

T: Tension of the rope

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The density of the rope can be calculated using the following expression:

u = M/L

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L: Length of the rope.

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