P2.1.6 - Equation Of Motion And Kinetic Energy Flashcards Preview

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Flashcards in P2.1.6 - Equation Of Motion And Kinetic Energy Deck (11)
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1
Q

What is the equation of motion?

A

Final velocity squared - initial velocity squared / 2 * distance * acceleration

2
Q

Why do we use distance in the equation of motion when it’s meant to be the displacement?

A

Distance and displacement have the same value since it is in 1 direction

3
Q

What is a kinetic store?

A

A system for which we can do an energy calculation

4
Q

What is the equation for calculating kinetic energy?

A

0.5 * mass * speed squared = kinetic energy

5
Q

Way is kinetic energy measured in?

A

Joules (J)

6
Q

What other values can you calculate by rearranging the equation for calculating kinetic energy?

A

Mass and speed

7
Q

How many joules are in 1kJ?

A

1000

8
Q

Rearrange the equation for kinetic energy to calculate mass

A

2 * Kinetic energy / speed squared = mass

9
Q

Rearrange the equation for kinetic energy to calculate speed

A

Speed = square root of 2 * kinetic energy / mass

10
Q

If an object’s speed and mass are higher, is its kinetic energy high or low?

A

High

11
Q

If an object’s speed and mass are lower, is its kinetic energy high or low?

A

Low