Forces and Motion Flashcards
Explain what is meant by a scalar quantity.
Give 2 examples
A scalar quantity is a magnitude. It can be described fully with a single numerical value
Ex: distance, speed, time, mass, energy..
Explain what is meant by a vector quantity.
Give 2 examples
A vector quantity has both a magnitude and a direction.
Ex: Force, velocity, displacement, momentum, moment…
Which property of a distance-time graph can be used to calculate speed?
Gradient
State an equation linking distance moved, time taken and average speed with their respective units.
Average speed(m/s) = Distance(m) / Time(s)
v=d/t
What is meant by acceleration?
Give its unit.
Acceleration is the change in velocity per
unit of time.
m/s^2
State an equation linking acceleration, change in velocity and time taken
Acceleration =(Change in velocity)/ time
a = (v-u) / t
v: final velocity u: initial velocity
Which property of a velocity-time graph can be used to calculate acceleration?
Gradient
Which property of a velocity-time graph can be used to calculate distance travelled?
Area under the graph
State an equation linking final speed, initial speed,
acceleration and distance travelled
Name two types of forces that always opposes motion
- Friction
- Air Resistance (Drag)
a) Which type of force holds planets around the Sun?
b) Which type of force holds electrons around nucleus?
A) Gravitational Force
B) Electrostatic Force
State the ways that a force can affect the body that it is being applied on.
-It can change the shape of the object (extension/compression)
-It can change the speed of the object
-It can change the direction the object is moving
