terminal velocity

Just after she jumps out of the plane (before the parachute opens). The relative forces will be

• Balanced

• Unbalanced

Just after she jumps out of the plane (before the parachute opens). The relative forces will be

• Weight force is equal to the friction force

• Friction force is constant

• Weight force is greater that the friction force

• Friction force is greater than the weight force

Just after she jumps out of the plane (before the parachute opens). The net force will be

• zero

• upward

• downward

Just after she jumps out of the plane (before the parachute opens). The sky diver will have

• a constant speed

• a constant acceleration

• a constant velocity

After the 60 seconds, the parachutist pulls the cord and opens her parachute.

Explain how the parachute reduces the speed of the parachutist when it is just opened.

• The friction force decreases

• The weight force decreases

• The weight force increases

• The friction force increases

Describe the motion at point a. on the graph.

• constant speed
• accelerating
• decelerating
• stationary

If this was the journey of a parachutist, what is happening at point e. ?

• He is decelerating
• He is accelerating
• He has reached a faster constant speed
• He has reached a lower constant speed. 

The graph shows the vertical speed of a parachutist. At which point did they open the parachute?

• A

• B

• C

• D

If a skydiver changes from a vertical to a horizontal position during freefall:

• His terminal speed would increase

• His terminal speed would decrease

• His terminal speed would stay the same

When a parachute canopy is opened more drag is created because:

• It has a large mass

• It has a large surface area

• It is travelling at terminal speed

• The person is now vertical