Question

A car having mass 500 kg is travelling on a highway with 30 m/s. The driver

accelerates the car to 70 m/s in just 5 seconds. Find the force exerted by the engine

of the car. ​

Answer 1

Answer:

follow me and make my answer brainlist plz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz

Answer 2

Given :

• Mass of the car = 500 kg

• Initial velocity of the car = 30 m/s

• Final velocity of the car = 70 m/s

• Time taken = 5 s

How to solve :

• As the car is moving with uniform acceleration we can use first kinematic in order to find the acceleration of the car
• Then, we can easily find the force by applying the newtons second law of motion

Solution :-

By using the first kinematic equation ,

⇒ v = u +a t

On re arranging ,

⇒ a = v - u / t

⇒ a = 70 - 30 / 5

⇒ a = 40 / 5

⇒ a = 8 m /s ²

By applying Newton's second law of motion ,

⇒ F = ma

⇒ F = 500 x 8

⇒ F = 4000 N

The force exerted by the engine of the car = 4000 N