Distance-Time graphs
Speed & Acceleration
Forces Definitions
Forces Calculations
Velocity-Time Graphs
100
What distance is travelled in section B?
0 km / none
100
Speed is a scalar quantity (has only magnitude, no direction), what is the vector quantity for speed called?
Velocity
100
Give an example of a vector quantity
Any variable with both magnitude and direction. E.g. Force, acceleration, displacement, velocity, gravitational field, current, etc
100
Which shows a zero resultant force? (top or bottom)
Top
100
Describe the motion in section B
Constant velocity
200
What distance is travelled in section C?
30km
200
A runner covers a 100m in 20s. What is their average speed?
5m/s
200
State Newton's Third Law
(standard quote…) For every action there is an equal and opposite reaction.
(More helpful to learn and understand…) When two objects interact, they exert equal and opposite forces on one another.
200
What is the resultant Force?
2N downwards
200
Describe the motion of section A
Acceleration
300
What is the average speed for section A?
Displacement = 30km
Time = 2h
Speed = distance / time = 30/2
Speed = 15 km/h
300
A car accelerates from rest to 20m/s in 5seconds. What is their acceleration?
4m/s2
300
State the three possible effects of an unbalanced force.
•change the object's speed
•change the object's direction
•change the object's shape
300
What is the direction and moment of force when 300N is applied at 0.1m from the pivot? (include units)
clockwise, 30Nm
300
What is the acceleration during section A
15 m/s2
400
What is the total displacement of this person?
0km (distance covered is 120km)
400
How far will a cyclist have covered if they travelled at 10m/s for 1minute?
600m
400
State Newton's First Law
If the forces on an object are balanced:
if it is stationary, it will remain stationary.
if it is moving, it will continue moving at steady
speed in a straight line.
400
Draw and calculate the resultant force.
(See handout)
400
What is the acceleration of section
-1.25 m/s2
500
What is happening between 30 and 60 seconds?
Person is accelerating
500
A car slows down from 20m/s to 10m/s in 20seconds. What is their acceleration?
-0.5 m/s2
500
How would you find the centre of mass of an irregular shaped object?
500
A car of weight 12kN is parked on an inclined road at an angle of 10o to the horizontal. Use the geometrical method to find the component of the car's weight acting down the slope.
2kN
500
What is the total distance covered in this graph
A: 75m
B: 150m
C: 150m+50= 200m
D: 250m
Total: 675m