Question

A car of mass 1000 kg starts from rest at t = 0 and under goes acceleration as shown in figure.

1. Draw the corresponding velocity-time graph. 

2. What is the retarding force acting on the car?

3. What is the total distance travelled by the car during t = 0 to t = 4 sec.

Answer 1

1.

2. Retarding acceleration, a = -3m/s² 

∴ Retarding force F = ma 

= 1000 × 3 

= 3000N. 

3. Area of velocity time gives distance. 

∴ Area = \(\frac{1}{2}\)bh = \(\frac{1}{2}\)× 4 × 6 

Distance = 12m.