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2 Motion and forces

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Question 170
H

A car of mass 1000 kg travels at 20 m/s. The driver’s reaction time is 0.50 s and a stationary obstacle is 35 m ahead when first seen. What is the minimum magnitude of a constant resultant braking force that would stop the car just at the obstacle?

[1]
A

8000 N8000\ \mathrm{N}8000 N

B

5700 N5700\ \mathrm{N}5700 N

C

6700 N6700\ \mathrm{N}6700 N

D

16000 N16000\ \mathrm{N}16000 N

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2 Motion and forces Questions

  1. GCSE
  2. /Physics
  3. /2 Motion and forces

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