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Leanne is riding a bike. The forward force from her pedalling is 18N. There is a backward force of 6N from friction and a backward force of 12N from air resistance. Does the speed of the bike increase, decrease or not change?

Respuesta :

the net force acting on the bike is=
18 - 6 - 12 = 0 N.

Since the net force acting on the bike is zero, the bike is moving with constant velocity. Therefore, the speed of the bike does not change.

The speed of the bike will not change.

What is Net force?

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

The net force acting on the bike will be

Net force = Forward force - backward force - air resistance

Net force = 18 - 6 - 12

Net force = 0 N.

Since, the net force acting on the bike is zero, the bike will be moving with constant velocity and no acceleration.

Therefore, the speed of the bike does not change.

Learn more about net force.

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