Which of these situations can increase the reaction time of a driver? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 5 - 2015 - Paper 1

To calculate the work done, we use the formula:

$$ext{Work} = ext{Force} imes ext{Distance}$$

Given:

• Average driving force = 1200 N
• Distance = 8.0 m

Substituting the values:

$$ext{Work} = 1200 ext{ N} imes 8.0 ext{ m} = 9600 ext{ J}$$

Thus, the work done by the force is 9600 J.

The kinetic energy (KE) can be calculated using the formula:

ext{KE} = rac{1}{2}mv^2

where:

• m = mass of the car = 1400 kg
• v = velocity = 25 m/s

Substituting the values:

ext{KE} = rac{1}{2} imes 1400 ext{ kg} imes (25 ext{ m/s})^2\ = 700 imes 625 = 437500 ext{ J}

Thus, the kinetic energy of the car is 437500 J.