# Forces and their effects

Flashcards by , created about 5 years ago

## GCSE Physics Flashcards on Forces and their effects, created by kate.siena on 04/22/2014.

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 Created by kate.siena about 5 years ago
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 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