Is distance a scalar or vector quantity?
Scalar
If I ran 400m around an athletics track, what would be my displacement?
0m (I have finished where I started).
Which team is winning this tug-of-war?
Red team (resultant force = 49N in the red direction)
Which team is winning this tug-of-war?
Blue team (Resultant force = 3N in the blue direction)
What is the name of the single force on an object, which is a combination of all of the forces acting on that object?
The resultant force
How much does Karen weigh? (g = 10N/kg)
650N
How do we represent vectors in diagrams?
As arrows, arrow have size and direction.
How can the drifting astronaut get back to the shuttle (has no thrusters in their suit)
Throw the hammer away from the shuttle, the equal and opposite force will send them back to the shuttle.
Define acceleration
Acceleration is the rate of change of velocity
Define a scalar
A quantity with size only.
Is displacement a scalar or vector quantity?
Vector
An ice hockey player pushes another ice hockey player. What will happen to the motion of both players?
Both players will move backwards
What is the resultant force on this trolley and in which direction?
0N
What is the resultant force on this trolley and in which direction?
20N right
The forces on this car are balanced. There is no resultant force. Therefore the car is stationary [True/false]
False, the drag force shows the car is moving at a constant velocity
If the forces on an object are balanced, what will be happening to the object's motion?
The object will be moving at a constant velocity or stationary.
If the forces on an object are not balanced, what will be happening to the object's motion?
The object will be accelerating or decelerating
Define a vector
A quantity with both size and direction, e.g. a force
What is the resultant force on this trolley and in which direction?
30N right
Is Energy a scalar or vector quantity?
Scalar (only has size)