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Force and motion
Question | Answer |
---|---|
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 |