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Force and motion

QuestionAnswer
When two forces act in opposite directions on an object what is the net force equal to? The difference between the two force (subtract)
If you pull a rope with 20N to the left and 10N to the right, which way will the rope go? left
What is the word that describes the tendency of objects to resist any change in their motion? inertia
A student places a ball on the ground and kicks it. The ball moves along the ground. Why does the ball move? The kick applies a force to the ball.
Juan is moving slowly on his rollerblades. Christina pushes him. What happens when Christina pushes Juan from behind? Juan will begin to move at a faster speed.
Why is it much harder to start pushing a cart full of books than it is to start pushing an empty cart? The cart with the books has more mass and more inertia.
In order for a glider to fly level, its weight must be opposed by lift. This is an example of balanced forces
Created by: Alan Johns
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