During an automobile crash test, the average force exerted by a solid wall on a 1,700 kg car that hits the wall is measured to b

Question

3 years ago

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During an automobile crash test, the average force exerted by a solid wall on a 1,700 kg car that hits the wall is measured to b

e 170,000 N over a 0.14 s time interval. What was the initial speed of the car (in m/s) prior to the collision, assuming the car is at rest at the end of the time interval

Physics

1 answer:

Molodets [167] · Answer 1 · 2022-09-10T11:27:48+03:00

Answer:

14 m/s

Explanation:

Step One:

Given data:

mass of automobile m= 1700kg

Force F= 170,000 N

time t= 0.14s

v= ??

Required

The velocity of the car

Step two:

From the expression given below, we can find the velocity

Ft= mv

make v subject of the formula

v= Ft/m

v= 170000*0.14/1700

v=23800/1700

v=14 m/s