A car weighing 13,000 N starts from rest and accelerates to 95.0 km/h in 5.00 s. The friction force is 1,450 N. Find the applied force (in N) produced by the engine. (Enter the magnitude.)

Question

Physics

Scott Moses

30 July, 08:18

A car weighing 13,000 N starts from rest and accelerates to 95.0 km/h in 5.00 s. The friction force is 1,450 N. Find the applied force (in N) produced by the engine. (Enter the magnitude.)

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Answers (1)

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Ronnie Shepard · Answer 1

= 8.46 * 10³N

Explanation:

W = 1.3 * 10⁴

v₁ = 0

v (friction) = 95km/h = 26.4 m/s

t = 5s

f = 1450N

mass of body = W / g

=1.3 * 10⁴ / 9.8

=1327 kg

v (friction) = v + at

substitute in eqn 1

26.4 = 5a

a = 5.28 m/s

Force Net = F₁ + F₂ + F₃ = ma

F (engine) = ma + F

= 1327 (5.28) + 1450

= 8.46 * 10³N