SPEED, VELOCITY AND ACCELERATION + PROJECTILES

Question 1

What is the equation for average velocity?

Answer 1

average velocity = displacement/time

Question 2

What does rectilinear motion mean?

Answer 2

Motion along a straight line.

Question 3

What are the units for velocity?

Answer 3

ms⁻¹ (metres per second)

Question 4

What are the units for acceleration?

Answer 4

ms⁻² (ms⁻¹ per second)

Question 5

What is the equation for acceleration?

Answer 5

a = (v-u)/t

Question 6

Acceleration and velocity are…

Answer 6

Vectors.

Question 7

If an object is slowing down (v-u) will be…

Answer 7

negative.

Question 8

What is s in a suvat and the unit?

Answer 8

displacement (m)

Question 9

What is u in a suvat and the unit?

Answer 9

initial velocity (ms⁻¹)

Question 10

What is v in a suvat and the unit?

Answer 10

final velocity (ms⁻¹)

Question 11

What is a in a suvat and the unit?

Answer 11

acceleration (ms⁻²)

Question 12

What is t in a suvat and the unit?

Answer 12

time (s)

Question 13

What is suvat equation 1?

Answer 13

v = u +at

Question 14

What is suvat equation 2?

Answer 14

s = (u+v)t/2

Question 15

What is suvat equation 3?

Answer 15

s = ut + 1/2at²

Question 16

What is suvat equation 4?

Answer 16

v² = u² + 2as

Question 17

In the absence of air resistance, all objects, whatever their mass…

Answer 17

Will fall freely with the same acceleration.

Question 18

The acceleration of free fall due to gravity has a value of …

Answer 18

9.8 ms⁻²

Question 19

If an object is thrown upwards, it will be accelerating downwards at 9.8 ms⁻². If the upward velocity is a positive velocity, the acceleration must be…

Answer 19

negative.

Question 20

In the vertical plane, the initial velocity is…

Answer 20

u sinθ

Question 21

In the horizontal velocity, the initial velocity is…

Answer 21

u cosθ