Basic physics, Dynamics and Kinematics

Question 1

What are SI units

Answer 1

International System of units
Widely recognised and nationally agreed way of measuring basic things such as time, distance and force

Question 2

What is the unit for Time

Answer 2

Seconds

Question 3

What is the unit for distance

Answer 3

Metres

Question 4

What is the unit for Force

Answer 4

Newton

Question 5

What is the unit for Mass

Answer 5

Kilogram

Question 6

What is the unit for temperature

Answer 6

Kelvin

Question 7

How many degrees are in 0 Kelvin

Answer 7

-273 degrees

Question 8

Define Dynamics

Answer 8

The study of forces and their effects

Question 9

Define dynamics

Answer 9

The study of forces and their effects

Question 10

What is displacement

Answer 10

The distance in a specific direction from one point

Question 11

What is Velocity

Answer 11

Rate of change of displacement

Question 12

What is equation for Velocity

Answer 12

Distance/Time

Question 13

Define acceleration

Answer 13

Rate of change of velocity

Question 14

What is the gradient of a Displacement Time graph

Answer 14

Velocity

Question 15

What is the gradient of a Velocity Time graph

Answer 15

Acceleration

Question 16

What is the gradient under a Velocity Time graph

Answer 16

Displacement

Question 17

What is the area under a Acceleration Time graph

Answer 17

Change in Velocity

Question 18

What is another name for Newton’s first law

Answer 18

Inertia

Question 19

What is the equation for weight

Answer 19

W = mg

Question 20

What is a free body diagram

Answer 20

A diagram that shows all forces acting upon an object

Question 21

What is equation for momentum

Answer 21

p=mv

Question 22

Is momentum a vector or scalar

Answer 22

Vector, has both magnitude and direction

Question 23

What is the principle of momentum conservation

Answer 23

In a closed system the momentum of two particles is equal both before and after.

Question 24

What is the equation for the Conservation of Momentum

Answer 24

m1 u1 + m2 u2 = m1 v1 + m2 v2

Question 25

What is the difference between elastic Collision and inelastic

Answer 25

In an elastic collision both momentum and kinetic energy are conserved

Question 26

What is impact

Answer 26

change of momentum caused by a force over time

Question 27

What is the equation for impulse

Answer 27

change of momentum = force x time

Question 28

Applications of impulse

Answer 28

Crumple zones in cars: Increase time by reducing force

Question 29

What is the equation for recoil

Answer 29

Initial momentum is 0 so 0 = m1 v1 + m2 v2