Terminal Velocity

What is the difference between free fall and terminal velocity?

• Free fall is when an object is thrown upwards, while terminal velocity is when it falls downwards.

• Free fall is the motion of an object under the influence of gravity alone, while terminal velocity is the constant speed reached when air resistance equals weight.

• Free fall occurs only in a vacuum, while terminal velocity occurs in the presence of air.

• Free fall is a type of terminal velocity that occurs at high altitudes.

What does it mean for an object to be in equilibrium?

• An object is in equilibrium when the net force acting on it is zero, meaning all forces are balanced.

• An object is in equilibrium when it is at rest and not moving at all.

• An object is in equilibrium when it is moving at a constant speed in a straight line.

• An object is in equilibrium when the forces acting on it are unbalanced.

What is the relationship between weight and air resistance at terminal velocity?

• At terminal velocity, the weight of the skydiver is greater than the air resistance.

• At terminal velocity, the weight of the skydiver is less than the air resistance.

• At terminal velocity, the weight of the skydiver is equal to the air resistance.

• At terminal velocity, the weight of the skydiver is independent of air resistance.

What effect does changing position from vertical to horizontal have on terminal velocity?

• Changing to a horizontal position increases terminal velocity.

• Changing to a horizontal position has no effect on terminal velocity.

• Changing to a horizontal position decreases terminal velocity.

• Changing to a horizontal position makes terminal velocity unpredictable.

What is the formula for calculating terminal velocity?

• Vt = sqrt((2 * m * g) / (p * A * Cd))

• Vt = (m * g) / (p * A * Cd)

• Vt = (p * A * Cd) / (2 * m * g)

• Vt = m * g * p * A * Cd

What is the role of gravity in free fall?

• Gravity is the force that pulls objects towards the Earth, causing them to accelerate downwards.

• Gravity is the force that pushes objects away from the Earth, causing them to decelerate upwards.

• Gravity is the force that keeps objects stationary in the air, preventing them from falling.

• Gravity is the force that only affects objects with mass, having no impact on free-falling objects.

What happens to air resistance as a skydiver falls?

• Air resistance decreases as the skydiver's speed increases.

• Air resistance remains constant regardless of speed.

• Air resistance increases as the skydiver's speed increases.

• Air resistance is negligible during free fall.

What happens to the forces acting on a parachutist at point B?

• The parachutist experiences only air resistance.

• The forces of weight and air resistance are balanced.

• The parachutist is accelerating downwards.

• The forces of weight and air resistance are unbalanced.

What happens to a skydiver's velocity as they fall?

• The velocity decreases steadily until they land.

• The velocity increases until terminal velocity is reached.

• The velocity remains constant throughout the fall.

• The velocity fluctuates randomly during the fall.

What is the effect of parachute deployment on a skydiver's fall?

• Deploying a parachute increases air resistance significantly, reducing the skydiver's speed.

• Deploying a parachute has no effect on the skydiver's speed.

• Deploying a parachute causes the skydiver to fall faster due to increased weight.

• Deploying a parachute makes the skydiver ascend instead of fall.