2. Kinematics

Question 1

Define displacement.

Answer 1

Displacement is the distance moved in a specific direction.

symbol = s

Question 2

Define distance.

Answer 2

Distance is how far an object travels.

no real symbol, so s is used

Question 3

Define speed.

Answer 3

Speed is rate of change of distance.

or distance travelled per unit time.

symbol used is v, although it belongs to velocity

Question 4

Define velocity.

Answer 4

Velocity is the rate of change of displacement.

symbol = v

Question 5

Define Acceleration.

Answer 5

Acceleration is the rate of change of velocity.

symbol = a

Question 6

In a velocity-time graph, what does the gradient represent?

Answer 6

In a velocity-time graph, the gradient represents acceleration.

Question 7

In a velocity-time graph, what is represented by the area under the graph?

Answer 7

In a velocity-time graph, the displacement is represented by the area under the graph.

Question 8

In a displacement-time graph, what does the gradient represent?

Answer 8

In a displacement-time graph, the gradient represents velocity.

Question 9

What is the formula used for the calculation of final velocity, with only, initial velocity, acceleration and time.

Answer 9

v = u + at

v - final velocity
u - initial velocity
a - acceleration
t - time

Question 10

What is the formula used for the calculation of displacement, with only, initial velocity, final velocity and time.

Answer 10

s = t x (u+v)/2

s - displacement
t - time
u - initial velocity
v - final velocity

{basically, half of u+v, times t}

Question 11

What is the formula used for the calculation of displacement, with only, initial velocity, acceleration and time.

Answer 11

s = ut + ½at²

s - displacement
u - initial velocity
a - acceleration
t - time

Question 12

What is the formula used for the calculation of velocity, with only, initial velocity, acceleration and displacement.

Answer 12

v² = u² + 2as

v - final velocity
u - initial velocity
a - acceleration
s - displacement