SP1z - Motion

Question 1

State the acceleration equation

Answer 1

(Final velocity - initial velocity) / time

Question 2

In the equation ‘ v^2 - u^2 = 2ax ‘ , what do the symbols mean? (Do not need to learn the equation)

Answer 2

V = final velocity
U = initial velocity 
A = acceleration 
X = displacement

Question 3

How do you calculate the distance travelled in a velocity-time graph?

Answer 3

Work out the area under the graph

Question 4

Describe a method of determining the speed of a moving object in a lab

Answer 4

• set up two light gates so that they measure the time from the first to the second
• measure the distance they are apart
• then set up a shallow ramp so a trolley rolls STEADILY from one light gate to the next
• then do distance divided by time to get the speed of the trolley

Question 5

What is the speed of sound in air?

Answer 5

About 330m/s to 340m/s depending on temperature

Question 6

What is the speed of light?

Answer 6

About 300,000,000m/s

Question 7

What is the value of Earth‘s acceleration due to gravity?

Answer 7

Acceleration in free fall is 10m/s^2

Question 8

How do you calculate velocity?

Answer 8

Velocity = displacement / time

Question 9

What is Newton‘s first law?

Answer 9

An object remains in the same state of motion unless a resultant force acts on it

Question 10

What is Newton’s second law?

Answer 10

Resultant force = mass x acceleration

f = ma

Question 11

What is Newton‘s third law?

Answer 11

Every action has an equal and opposite reaction