Unit 3: accelerated Motion

which feature of a graph allows acceleration to be determined

• the area under a displacement-time graph

• the area under a velocity-time graph

• the slope of a displacement-time graph

• the slope of a velocity time graph

A particle is moving in a straight line with uniform acceleration.

which graph represents the motion of the particle?

• A

• B

• C

• D

If I drop an apple from the top of building, and it takes 5s to hit the ground calculate how tall the building is in meters if the acceleration of gravity is 9.81 m.s-2? (write in 2 dp)

• 122.63 m

• 122.64 m

• 122.62 m

• 122.65 m

Andi drops a rock from rest from a guard rail overlooking a valley. What is the velocity of the rock at 11s? the acceleration of gravity is 9.81 m.s^-2

• 107.81

• 1107.91

• 107.91

• 107.23

Suppose a tourist threw the rock with an initial velocity of 8.0 m/s (down). Determine the velocity at 4s. The acceleration of gravity is 9.81 m/s

• 31.14

• 32.14

• 32.24

• 31.24

Chika doing serve at 50 m/s while playing tennis ball, what its maximum height from the initial position? the acceleration of gravity is 9.81 m/s^2?

• 127.42 m

• 127.24 m

• 172.42 m

• 172.24 m

What is the final velocity of a rocket travels for 4 seconds, has an initial velocity of 12km/s and an acceleration of 2 km/s²?

• 40 km/s

• 30 km/s

• 20 km/s

• 10 km/s

what is the unit of acceleration

• m/s²

• m/s¹

• m

• s

A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?

• 0.7m/s²
• 7m/s²
• 14m/s²
• none of the above

What is happening in this graph from point B to C?

• The object is going down a hill.
• The object is returning to its starting location.
• The object is slowing down.
• The object is staying still.