Conceptual Physics - M5 Quiz

The circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second then its linear speed is

2 m/s

If you throw a stone horizontally from the top of a cliff, one second after leaving your hand its vertical distance below the top of the cliff is

5 m

A projectile is launched vertically upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

50 m/s

A bullet fired horizontally from a rifle begins to fall

as soon as it leaves the barrel

If Earth had a pair of identical moons on opposite sides of the same circular orbit, the center of gravity of the double-moon-Earth system would be

at the center of the Earth

The long, heavy tail of a spider monkey enables the monkey to easily vary its

center of gravity

When you do somersaults, you'll more easily rotate when your body is

curled into a ball shape

If Earth's radius somehow increased with no change in mass, your weight would

decrease

While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its vertical component of velocity

decreases

A ball is tossed upward. Neglecting air drag, the acceleration along its path is

g downward

When a twirling ice skater brings her arms inward, her rotational speed

increases

As soon as a ball rolls off the edge of a table

it is not acted on by any horizontal forces

If the Sun were twice as massive

its pull on Earth would double and the pull of Earth on the Sun would double

When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be

less

If the Sun became twice as massive, your attraction to the Sun would double and your weight as measured on Earth would

not change

If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would

quadruple

As a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size and

rotates faster

Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance away. Compared to the time for the ball to simply drop vertically from the bench, the time in the air for Dr. Chuck's projected ball is

the same

Nellie tosses a ball upward at an angle. Assuming no air resistance, which component of velocity changes with time?

the vertical component

Planets would crash into the sun if it weren't for

their tangential velocities

If Alex wishes to rotate his skateboard, then he must apply a

torque

A difference between linear motion and angular momentum involves

two types of speed and a radial distance

Tidal forces in general are the result of

unequal forces acting on different parts of a body

Inside a freely-falling elevator, you would have no

weight

Inside a freely-falling runaway elevator, your

weight is zero