P5 - Forces and Motion

Question 1

What is velocity?

Answer 1

Velocity is speed with a given direction, e.g. East, 5m/s

Question 2

How do you work out relative speed?

Answer 2

If a car is overtaking, fast car velocity - slow car velocity. If going opposite direction, add speeds together.

Question 3

What is a parabola?

Answer 3

A curve - the path of a projectile. This is called the trajectory.

Question 4

What is the optimum angle for trajectory?

Answer 4

45 degrees

Question 5

What does ‘u’ stand for?

Answer 5

Initial velocity (speed)

Question 6

What does ‘v’ stand for?

Answer 6

Final velocity (speed)

Question 7

What does ‘s’ stand for?

Answer 7

Displacement (distance)

Question 8

What does ‘t’ stand for?

Answer 8

Time

Question 9

What does ‘a’ stand for?

Answer 9

Acceleration

Question 10

What are the steps for choosing the correct motion equation?

Answer 10

1. ) Write down three things you know
2. ) Write down what you want to find out
3. ) Choose an equation that involves all of those parts
4. ) Substitute into Q

Question 11

Does gravity affect horizontal motion?

Answer 11

Nope.

Question 12

How do we calculate projectile motion?

Answer 12

Calculate horizontal and vertical motion separately.

Question 13

What’s the difference between speed and velocity?

Answer 13

Speed is how fast it is going, but Velocity is the direction and how fast

Question 14

What does relative speed do?

Answer 14

Compares the speed of two different objects

Question 15

What are the steps for rearranging an equation?

Answer 15

1. )Move equation until one you need to get is on the left

2. ) Do the inverses to both sides to get the term on one side.