According to Newton’s second law of motion:
F=ma
=80*0.5
=40N
Explanation:
Speed is distance over time.
500 km / 2 hr = 250 km/hr
Velocity is speed and direction.
250 km/hr north

The correct choice is ~ A
Bikes don't require gasoline for their functioning, so it causes less air pollution.
If argon could exist as a solid, 3200 m/s would best represent the speed through solid argon.
The amplitude of wave-c is 1 meter.
The speed of all of the waves is (12meters/2sec)= 6 m/s.
The period of wave-a is 1/2 second.