Question

A 2,000 kg car, initially traveling at a speed of 15 m/s, is accelerated by a constant force of 10,000 N for 3 seconds. The new speed of the car is

Answer 1

• Mass (m) = 2000 Kg
• Initial velocity (u) = 15 m/s
• Force (F) = 10000 N
• Time (t) = 3 s
• Let the acceleration be a.
• We know, F = ma,
• Therefore, 10000 N = 2000 Kg × a
• or, a = 10000 N ÷ 2000 Kg = 5 m/s^2
• Let the final velocity be v.
• By using the equation of motion, v = u + at, we get
• v = 15 m/s + 5 m/s^2 × 3 s
• or, v = 15 m/s + 15 m/s = 30 m/s

Answer:

The new speed of the car is 30 m/s.

Hope you could get an idea from here.

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