Physics (Kinematics Yr10)

Question 1

What are Newton’s 3 Laws

Answer 1

1. Every object remains in its state of motion unless acted upon by an outside force
2. Force = Mass * Acceleration
3. For every action there is an equal and opposite reaction

Question 2

Scalar vs Vector Quantities (and examples)

Answer 2

A scalar quantity has magnitude but no direction (distance, speed)
A Vector Quantity has magnitude AND direction (displacement, velocity)

Question 3

What is Acceleration

Answer 3

Change in Velocity over time

Question 4

What is Velocity

Answer 4

Change in Displacement over Time
Displacement over Time

Question 5

Inertia

Answer 5

An object’s tendency to remain in its current state of motion. Laziness

Question 6

Momentum and what it is measured in

Answer 6

Laziness in Motion. An object in motion’s tendency to remain in motion. Measured in Kg * m/s

Question 7

Impulse

Answer 7

Force over time. If Force is delivered over short time it is high specific impulse and if it is delivered over a short time it is low specific impulse

Question 8

Law of Conservation of Momentum

Answer 8

States that in the absence of an external force (gravity, friction), the total momentum before the collision is equal to the total momentum after the collision

Question 9

What are the 3 kinds of Collisions?

Answer 9

Elastic - Starts with 2 objects and ends with 2
Inelastic - Starts with 2 objects and ends with 1
Explosion - Starts with one object and ends with 2

Question 10

Kinetic Energy Equation

Answer 10

(1/2)(mass)(velocity)^2

Question 11

Equation to calculate Acceleration (and the version rearranged for Final Velocity)

Answer 11

Change in Velocity/ Time
(Vf - Vi)/ t

Rearranged as:
Final Velocity = Initial Velocity + (acceleration)(time)

Question 12

Equation to Calculate Displacement

Answer 12

Displacement = (Initial Velocity)(Time) + (1/2)(Acceleration)(Time)^2
S = (Vi)(t) + (1/2)(a)(t)^2