Mechanical Comprehension Flashcards
1
Q
What is the formula V = IR for?
A
Ohm’s law
Voltage = Current x Resistance
1
Q
When do Pendulums swing at their fastest speed?
A
When the weight is highest
2
Q
What is meant by class lever? Name all three classes.
A
First class lever - Fulcrum is in the middle e.g. seesaw, scissors or crowbar
Second class lever - Load is in the middle e.g. wheelbarrow, nutcracker or bottle-opener
Third class lever - Effort is in the middle e.g. broom, fishing rod or tweezers.
3
Q
Equation for force?
A
Force = mass x acceleration
4
Q
Equation for momentum?
A
Momentum = mass x velocity
This when momentum is measured in Kg m/s, mass is measured in Kg and velocity is measured in m/s
5
Q
Equation for acceleration?
A
acceleration = change in velocity/time taken
6
Q
A
