Forces and Motion Quiz True or False

1.	Deceleration results from: -> Applying a force opposite the direction of motion True False
2.	According to Newton’s Third Law, for every action there’s an opposite and equal reaction. As we punch air, why don’t we feel anything? -> Air has little mass, its weight isn’t affected by gravity. True False
3.	We simultaneously throw one ball horizontally while dropping another from the same height. Which lands first? -> They land at the same time. True False
4.	Which of the following can be said regarding an object in circular motion? -> The bigger the circle, the faster the speed to keep the same acceleration. True False
5.	Which variable is the same for both x- and y- components when dealing with projectile motion? -> Time True False
6.	At which angle must a cannonball be launched for its x- and y-components of initial velocity to be equal? -> 0° True False
7.	If the radius of the Earth suddenly tripled, but mass stayed the same, what could be said about Earth’s gravitational acceleration at its surface? -> It would depend on the position of the Moon. True False
8.	You drop an apple from a 5 meter high balcony. What is the apple’s final velocity? -> True False
9.	If the Earth’s gravitational acceleration tripled, what would be the answer to the above question? -> –17.2 m/s True False
10.	At maximum height, a cannonball has: -> No y-component of velocity True False

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