Forces and their effects

Question	Answer
What is a scalar?	A quantity with magnitude only
What is a vector?	A quantity which has magnitude and an associated direction
How do you find the speed of an object on a distance time graph?	You calculate the gradient of the line
What is the velocity of an object?	Its speed in a given direction
How do you determine the distance travelled by an object on a velocity time graph?	Calculate the area under the line
Whenever two objects interact, the forces they exert on each other are 1. Unequal and parallel 2. Equal and parallel 3. Equal and opposite 4. Unequal and opposite	3. Equal and opposite
What is a resultant force?	A single force that has the same effect on the motion as the original forces all acting together
If the resultant force acting on a stationary object is zero, what will happen?	The object will remain stationary
If the resultant force acting on a stationary object is not zero, what will happen?	The object will accelerate in the direction of the resultant force
If the resultant force acting on a moving object is zero, what will happen?	The object will continue at the same speed in the same direction
If the resultant force acting on a moving object is not zero, what will happen?	The object will accelerate in the direction of the resultant force
What is the conservation of momentum?	The idea that the total momentum before an event is equal to the total momentum after the event

Resource summary

	Created by kate.siena almost 10 years ago