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Initially, the parachutist will experience a greater downwards force due to gravity which causes them to accelatae downwards. As they accelarate, the upwards force of air resistance will increase. They wi...

Acceleration is the rate of change of velocity, so we subtract the final velocity from the initial velocity and divide it by the time taken for the change. In this case the acceleration i...

When the oscillations of the waves are parallel to the wave energy, we call the wave longitudinal. An example of a longitudinal wave could be sound waves.

In the Sun the main fusion process is the fusion of hydrogen nuclei to form helium nuclei. Any two hydrogen nuclei repel each other as they are both positively charged, for the fusion to occur the two nuc...

In a car crash the car decelerates really quickly. If there is no air bag your head continues to travel at the same speed as before until it hits the dash board and decelerates really quickly upon impact,...