Force,Mass,Weight
A force is an action that changes the shape size or motion of a body and examples are Gravitational, Magnetic and Electrostatic
True/False
TRUE
Galileo invented observation and hypothesis
True/False
True
What is the SI unit of Power and Pressure
Watt W and Pascal Pa
A simple pendulum consists of a mass m hanging from a length L .
True or False
False
Name two types of errors
Random and systematic
What is the gravitational field strength of the Earth?
10Nkg-1
What is the manipulating variable?
The variable that is being investigated
What is Density? (based on the formula)
The mass per unit volume of a substance
Length of the string.
State two ways to solve vectors.
Parallelogram method and Polygon method
What is Friction?
A mechanical force that oppose relative motion of the surfaces of bodies in contact with each other.
m= y2-y1/x2-x1
kgm-3
What is an oscillation?
One complete cycle of swinging one way and then returning to its original starting position.
Scalar: mass, length, time, temperature, area, volume, speed, pressure, distance, work, energy, power, resistance, current
Vector: force, momentum, displacement, velocity, acceleration.
What is the weight of a 45kg bag of flour on Earth?
450N
This straight line connects majority of the points on a graph
Best fit line
Name three Base quantities and their SI units
Mass, Kilogram, Length, Metre, Time, Seconds, Current, Ampere, Temperature, Kelvin, Amount of substance, Mole, Luminous intensity, Candela
As mass increases, so does the force on the pendulum, but acceleration remains the same. Why?
Force of Gravity
The value of the error must be discovered and then added or subtracted from each reading or the instrument may be adjusted
Differentiate between mass and weight.
Mass- The quantity of particles making up a body
Weight- Force of gravity on an object.
Which variable may be affected by a change in the independent variable?
Dependent variable
State one way the density of an irregular object can be obtained
The measuring cylinder method or the Eureka can method
The time taken for one oscillation
How do you solve a perpendicular vector?
The resultant horizontal and vertical vectors are first found then these resultants are combined using Pythagoras’ Theorem.