Untitled Presentation

Multiple Choice

Which of the following best describes the concept of terminal velocity?

• The maximum speed an object reaches when falling through a fluid, where forces are balanced.

• The initial speed of an object when it starts to fall.

• The speed at which air resistance is zero.

• The speed at which an object bounces back after hitting the ground.

Open Ended

Why is understanding terminal velocity important in real-life situations such as skydiving?

Multiple Choice

On which celestial body would a skydiver experience the least gravitational pull?

• Earth

• Moon

• Mars

• Jupiter

Multiple Choice

Which of the following correctly represents the formula for calculating the weight of a falling object?

• Weight = mass x gravity

• Weight = gravity / mass

• Weight = mass / gravity

• Weight = gravity x mass squared

Multiple Select

What happens to air resistance when a skydiver changes position during free fall?

• It increases

• It decreases

• It remains the same

• It disappears

Open Ended

Explain how the forces acting on a skydiver change from the moment they jump out of the plane to when the parachute opens.

Fill in the Blanks

Stage 1 — after just jumping from the plane the skydiver is not moving very fast — their

is a bigger force than their air resistance, so they accelerate downward.

Open Ended

Describe what is meant by terminal velocity in the context of skydiving.

Multiple Choice

When the parachute opens during skydiving, why does the skydiver slow down?

• Because air resistance becomes greater than the weight force

• Because the weight force increases

• Because gravity decreases

• Because the parachute adds weight

Open Ended

Explain how the forces acting on a skydiver change from the moment the parachute opens to when a new terminal velocity is reached.

Fill in the Blanks

Eventually, the resistance forces become equal to the

force and the object remains at a constant speed.

Multiple Select

Which of the following statements about terminal velocity is correct?

• Terminal velocity is reached when resistance equals accelerating force

• Terminal velocity is the maximum speed an object can reach

• Terminal velocity occurs only in water

• Terminal velocity means the object stops moving

Open Ended

Describe how the resultant force affects the motion of an object, using the example of a car accelerating from rest and at a constant speed.

Multiple Choice

A car of mass 1750kg has an engine producing a driving force of 5200N, with a drag force of 5150N at 70mph. What is its acceleration at 70mph?

• 0.03 m/s²

• 3.0 m/s²

• 1.0 m/s²

• 0.3 m/s²

Multiple Choice

Which part of the velocity-time graph for a parachute jump represents the moment when the parachute opens?

• The initial steep increase in velocity

• The flat section at maximum velocity

• The sudden drop in velocity

• The final constant low velocity

Multiple Choice

Which of the following factors will increase the terminal velocity of a falling object?

• Increasing the mass of the object

• Increasing the surface area of the object

• Increasing the drag force

• Decreasing the gravitational field strength

Open Ended

Explain how the shape and surface area of an object affect its terminal velocity when falling through a fluid.

Open Ended

Describe the motion of a skydiver when the upward force (drag) is smaller than the downward force (weight), and when both forces are equal.

Fill in the Blanks

What causes force X acting upwards on a skydiver during a fall?

Fill in the Blanks

The equation which links weight, gravitational field strength and mass is: Weight =

x gravity

Fill in the Blanks

Terminal velocity is reached when the force of gravity is balanced by the force of

.

Open Ended

How would you explain the concept of terminal velocity to someone who has never heard of it before?