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
