Posted by **Precious** on Friday, January 4, 2013 at 7:25pm.

A car of mass 400kg moving initial at 36km/h increases to 120km/h in 6sec, what is the force acting on the car?

- Mechanics - physics -
**drwls**, Saturday, January 5, 2013 at 2:17am
Force = Mass x Acceleration

For the force to be in Newtons, the Mass must be in kg (400 kg in this case), and the acceleration must be measured in m/s^2.

In your case, acceleration is

(84 km/h *1000 m/km)*)(1h/3600 s)/6 s

= 3.889 m/s^2

F = 400 kg*3.889 m/s^2 = 1556 N

## Answer this Question

## Related Questions

- physics - the velocity of a car increases from 36km/hr to 54km/hr in one minute ...
- 11th grade Physics - Consider a situation in which your car, when coasting down ...
- physics - A car of mass 1000kg moving with a velocity of 36km/h hits a wall and ...
- Physics Help, Please! - When a car goes around a curve (without skidding), on a...
- physics - A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due ...
- physics - A short train (an engine plus four cars) is accelerating at 1.10 . The...
- Physics - A car with a mass of 1797 kg is moving to the right at a constant ...
- physics - A car of 1500 kg mass moving with constant speed 10m/s for 10s . ...
- physics - A car, mass - 1950 kg, accelerates at +2.33 m/s (squared). Find the ...
- physics - A car is rounding a circular curve of radius r on a banked turn. As ...

More Related Questions