Terminal velocity

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

• Balanced

• Unbalanced

Tags

NGSS.HS-PS2-1

Explain why the skydiver will eventually stop accelerating

• The air resistance continues to increase as long as the velocity increases. When the air resistance reaches the same value as the weight there will be no resultant force, hence no acceleration (F=ma)

• The air resistance continues to decrease as long as the velocity increases. When the air resistance is larger than the weight there will be no resultant force, hence no acceleration (F=ma)

• The air resistance stays the same so the velocity increases. There will be no resultant force, hence no acceleration (F=ma)

• The air resistance continues to increase as long as the velocity increases. When the air resistance reaches the same value as the weight there will be an increase in acceleration

a) When should a sky diver open his/her parachute?

b) Why?

• a) anytime

  b) a parachute has a large surface area so increases air resistance

• a) Anytime

  b) Since this will be when the air resistance is at a maximum. This will give the greatest increase in drag needed to slow down the diver.

• a) When the resultant force is zero (air resistance = weight)

  b) a parachute has a large surface area so increases air resistance

• a) When the resultant force is zero (air resistance = weight)

  b) Since this will be when the air resistance is at a maximum. This will give the greatest increase in drag needed to slow down the diver.

Which of the following is the correct equation which relates gravitational field strength, mass and weight?

• Weight = mass / gravitational field strength

• Weight = mass + gravitational field strength

• Weight = mass x gravitational field strength

• Weight = mass² x gravitational field strength

What do we call the special case of velocity of an object when it falls through a medium at its fastest velocity, and cannot accelerate any more.

Identify true statements:

• The parachutist has just left the plane

• Weight is increasing

• There is no drag

• Weight is constant

• Deceleration

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Identify true statements:

• Drag is increasing

• Velocity is increasing

• There is no drag

• Weight is increasing

• Deceleration

Tags

NGSS.HS-PS2-1

Identify true statements:

• Drag is increasing

• Velocity is increasing

• Terminal velocity

• Acceleration

• Maximum drag

Tags

NGSS.HS-PS2-1

Identify true statements:

• The parachutist opens their parachute

• Deceleration

• Terminal velocity

• Weight is increasing

• Drag is constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Identify true statements:

• Drag is decreasing

• Velocity is increasing

• Drag is increasing

• Velocity is decreasing

• Weight is constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4