A2200 kg truck is coming down a hill 50 m high towards a stop sign. what force will the brakes need to provide (in n) in order to stop the truck in the 300 m before the sign? (this is a conservation of energy problem). use g = 10 m/s^2.

The force required by the brakes is

Solution:

As per the question:

Mass of the truck, M = 2200 kg

Height, h = 50 m

distance moved by the truck before stopping, x = 300 m

Force required by the brakes to stop the truck, can be calculated by using the law of conservation of energy.

Now,

Kinetic Energy(K.E) downhil, K.E = reduction in potential energy,

Work done is provided by the decrease in K.E,i.e.,  change in potential energy.

W =

F =

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation: