AQA A Level Physics 3.4.1.4 Projectile motion

A projectile follows a ​ (a)   path. The horizontal velocity is ​ (b)   . The vertical velocity is ​ (c)   ​ (d)   .

• parabolic
• arched
• hyperbolic
• constant
• accelerating
• downwards
• upwards
• increasing
• decreasing

Tags

NGSS.HS-PS2-1

• B

• Vertical velocity is negative

• D

• Almost all GPE transferred to KE

• C

• Largest speed

• All

• Horizontal velocity is constant

• A

• Vertical velocity is zero

Where air resistance is not negligible. A projectile's path is different. The horizontal velocity is ​ (a)   due to the force of ​ (b)   . The vertical velocity is ​ ​ (c)   due to the ​ (d)   force of weight ​ (e)   by air resistance.

• decelerating
• drag
• resultant
• accelerating
• opposed
• weight
• combined
• and

A falling object starting at rest has one force acting on it, the force of ​ (a)   . Its velocity is ​ (b)   , and its acceleration is ​ (c)   .

• weight
• gravity
• drag
• zero
• small
• high
• 9.81m/s^2
• increasing
• decreasing

A falling object experiencing air resistance will accelerate ​ (a)   . As it gets ​ (b)   , the force of drag ​ (c)   . Eventually, the force of drag ​ (d)   the weight, and acceleration is ​ (e)   .

• more slowly
• 9.81m/s^2
• more quickly
• faster
• weaker
• higher
• increases
• decreases
• equals
• zero

Drag is increasing because the parachutist's ​ (a)   is increasing. When drag is equal and opposite to weight, forces will be ​ (b)   , velocity will be ​ (c)   and acceleration will be ​ (d)   .

• speed
• constant
• zero
• balanced
• force
• acceleration
• unbalanced
• 9.81m/s^2

Speed-time graph of a parachutist

• A

• weight is constant

• All

• terminal velocity without a parachute

• C

• about to land on the ground

• B

• terminal velocity with a parachute

• B to C

• drag equal to weight

A hypersonic aeroplane uses maximum power to accelerate. ​ Driving force is constant . As the speed increases, ​ (a)   increases, causing acceleration to ​ (b)   until forces are ​ (c)   and speed is ​ (d)   .

• drag
• decrease
• balanced
• constant
• weight
• increase
• unbalanced
• combined
• zero
• driving force