Physics Example Questions Flashcards
Which graph best represents the graviational force between two point mases as a function of the distance between
masses?
As it goes from force to distance it goes down
A child is riding on a merry-go-round. As the speed of the merry-go-round is doubled, the magnitude of the centripetal force acting on the child
Is quadrupled
A coin and a ring roll down an incline starting at the same time. The one to reach the bottom first will be the
A) ring.
B) coin.
C) Both reach the bottom at the same time.
B
If you balance a broom horizontally on one finger, the center of gravity of the broom will be above your finger - closer to the bristles end than the handle end. If you saw the broom in two pieces at that point and weigh the two parts on a scale, you’ll find that the heavier part is the bristles part.
B) handle part.
C, ooth the same weight
C
If the radius of the Earth somehow decreased with no change in mass, your weight would Abincrease.
B) not change.
C) decrease.
A
Which has a greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?
A) The outside horse
B) The inside horse
C Neither - they have the same speed.
C
Stand a meter stick on its end and let go and it rotates to the floor. If you attach a heavy weight to its upper end and repeat, falling time will be
Ay more.
B) less.
C) the same.
A
An object will fall over if its center of gravity is
A) too high.
B) too low.
C) not over its area of support.
D) outside the object.
C
Torque is defined as mass times velocity
A) mass time velocity
B) force times mass
C) mass times acceleration.
D)
force times lever arm length.
D
A pizza maker throws dough into the air to increase the size of crust. As this diameter of the spinning pizza dough increases, the rotational speed
A) increases.
B) decreases
C) remains the same.
B
Which has a greater tangential speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?
A) The outside horse
B) The inside horse
C) Neither - they have the same speed.
A
According to Newton, the greater the masses of interacting objects, the
A) less the gravitational force between them.
B) greater the gravitational force between them.
C) greater the force between them by the square of the masses.
B
The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much.
This is because
A) your mass is 100 times less on Jupiter.
B) Jupiter is significantly farther from the
C) Jupiter’s radius is 10 times the Earth’s radius.
D) you are 100 times more weightless there.
E) none of these
C
Why is your weight not one-quarter as much when you climb to the top of a twice as tall tree?
A) Because parts of the tree itself gravitationally attract you.
B) But it is in accord with the inverse-square law.
C) Because, quite simply, of Newton’s law f action and reaction.
D) Because you’re not twice as far from the Earth’s center.
D
Gravity accounts for
A) the shapes of the planets, sun and the Earth.
B) the paths of the planets around the sun.
C) the ocean tides.
D) None of these.
E) All of these.
E
