Think you’ve got your head wrapped around Forces and Motion? Put your knowledge to
the test. Good luck — the Stickman is counting on you!
Q. Deceleration results from:
Accelerating in the negative y-direction
Accelerating in the negative x-direction
Applying a force perpendicular to the direction of motion
Applying a force in the original direction of motion
Applying a force opposite the direction of motion
Q. 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?
Newton’s Third Law only applies to cases that involve gravity.
Air has little mass, so its punch back is as small as our punch forward.
Air has little mass, its weight isn’t affected by gravity.
We’re moving all the particles out of our way.
All of the above
Q. We simultaneously throw one ball horizontally while dropping another from the same height. Which lands first?
The ball thrown horizontally
The ball dropped
They land at the same time.
It depends on air resistance.
It depends on how far from the center of the Earth they’re positioned.
Q. Which of the following can be said regarding an object in circular motion?
The centripetal acceleration is independent of the circle’s size.
The circle’s size doesn’t affect the centripetal acceleration.
The bigger the circle, the smaller the speed to keep the same acceleration.
The smaller the circle, the faster the speed to keep the same acceleration.
The bigger the circle, the faster the speed to keep the same acceleration.
Q. Which variable is the same for both x- and y- components when dealing with projectile motion?
Time
Velocity
Acceleration
Displacement
Final position
Q. At which angle must a cannonball be launched for its x- and y-components of initial velocity to be equal?
0°
45°
90°
180°
360°
Q. 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 remain the same.
It would decrease.
It would depend on the position of the Moon.
It would depend on the position of the Earth relative to the Sun.
It would match the Earth’s centripetal acceleration.
Q. You drop an apple from a 5 meter high balcony. What is the apple’s final velocity?
It depends on the mass of the apple.
Q. If the Earth’s gravitational acceleration tripled, what would be the answer to the above question?
–9.9 m/s
–17.2 m/s
–29.7 m/s
–29.4 m/s
It depends on the mass of the apple.
Q. At maximum height, a cannonball has:
No y-component of velocity
No x-component of velocity
Neither a y-component of velocity nor an x-component
Both a y-component of velocity and an x-component
It depends on the initial velocity of the cannonball.