Question

An 8500 kg truck moving at 11 m/s collides with a 1500 kg car at rest....

An 8500 kg truck moving at 11 m/s collides with a 1500 kg car at rest. The coefficient of friction is .53.

a) How fast is the truck going after the collision?

b) How long until the truck comes to a stop?

c) How far does it travel before coming to a stop?

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Answer #1

Considering it as an elastic collision and since the collision takes place in a very short period the frictional effects can be neglected.

We have,

Take as masses of the truck and the car respectively

Then will become zero, then the formula will be reduced to

Hence the truck velocity, and th car velocity,.

Given the friction co efficient as 0.53 therefore the deceleration would be a='0.53g'

Time

t = 1.48 seconds

For distance we have

s=5.7075mts

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