A 1700-kg car goes from 0 to 100 km/h in 51 s . Part A What is the impulse deliv

ID: 1355052 • Letter: A

Question

A 1700-kg car goes from 0 to 100 km/h in 51 s .

Part A

What is the impulse delivered to the car? Assume that the direction of the motion of the car is the positive direction.

Express your answer with the appropriate units.

Part B

What is the average vector sum of forces exerted on the car? Assume that the direction of the motion of the car is the positive direction.

Express your answer with the appropriate units.

A 1700-kg car goes from 0 to 100 km/h in 51 s .

Part A

What is the impulse delivered to the car? Assume that the direction of the motion of the car is the positive direction.

Express your answer with the appropriate units.

Mass of the car M = 1700 kg

Initial velocity Vi = 0 m/s

Final velocity Vf = 100 km/h = 27.78 m/s

Time t = 51 sec

(A) Impulse = change in momentum

I = delta P

I = m(Vf - Vi)

I = 1000 (27.78 - 0)

I = 2.78 x 104 Kgm/s

(B) Impulse = average force * time

I = F * t

2.78 x 104 = F*51

F = 5.45 x 102 N

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