1. Horses that move with the fastest linear speed on a merry-go-round are
located
a. Near the center.
b. Near the outside.
c. Anywhere because they all move at the same speed.
2. When a golf ball reaches the highest point of its trajectory, its velocity
a. goes to zero
b. becomes maximum
c. is directed in vertical direction
d. is directed in horizontal direction
3. Which moves faster in m/s on a merry-go-round: a horse on the inside or a horse on the outside near the outer rail?
a. Inside horse
b. Outside horse
c. Both move at the same speed in m/s.
4. If a record players rotational speed is doubled, then the linear speed of a pet hamster sitting on the edge of the record will
a. Double
b. Halve
c. Remain the same.
5. Suppose the circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second when you are riding the bicycle, then your speed will be
a. 1 m/s
b. 2 m/s
c. 3 m/s
d. 3.14 m/s
e. 6.28 m/s.
6. An industrial flywheel has a greater rotational inertia when most of its mass is
a. Nearest the rim
b. Nearest the axis
c. Uniformly spread out as in a disk.
7. 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.
8. The rotational inertia of your leg is greater when your leg is
a. Straight
a. Bent
b. ..same either way.
9. A torque acting on an object tends to produce
a. Equilibrium
b. Rotation
c. Linear motion
c. Velocity
d. A center of gravity.
10. Toss a baseball bat into the air and it wobbles about its
a. Geometrical center
b. Center of mass
c. Heavier end.
11. The center of mass of a human body is located at a point
a. Which is fixed, but different for different people
b. That is always directly behind the belly button
c. That changes as a person bends over
d. None of these.
12. A person weighs less at the equator than at the poles. The main reason for this has to do with the
a. Spin of the Earth
b. Tidal bulges
c. Higher temperature at the equator, and the expansion of matter
d. Influence of the sun, moon, and all the planets
e. Law of action and reaction.
13. Consider a rotating donut-shaped space habitat where living quarters are on the inside surface farthest from the axis. If the rotational speed of the habitat increases, the apparent weight of people inside
a. Increases
b. Decreases
c. Stays the same.
14. A tightrope walker more easily balances on a tightwire if his pole
a. Is held high
b. Droops
c. Is short but heavy
15. To turn a stubborn screw, it is best to use a screwdriver that has a
a. Wide handle
b. Long handle
c. Yellow color
d. None of these.
16. A car travels in a circle with constant speed. The net force on the car is
a. Directed forward, in the direction of travel
b. Directed towards the center of the curve
c. Zero because the car is not accelerating
d. None of these.
17. A ring and a disk, initially at rest, roll down a hill together. The one to reach the bottom first
a. Is the ring
b. Is the desk
b. Depends on the masses
c. Depends on the relative rotational inertias
d. Both reach the bottom at the same time.
18. Which will roll down an incline in the shortest time, a can filled with water or the same can filled with ice?
a. With water
b. Ice
c. Both the same
d. Not enough information is given.
19) A projectile goes through a parabolic trajectory. At the maximum height
a. its velocity is zero
b. its acceleration is zero
c. neither (a) nor (b)
d. both (a) and (b)
20) A disk thrower wants to reach the maximum range. To achieve this he should throw the disk at an angle of projection which is equal to, (neglecting air resistance)
21) When a golf ball is projected at an angle of 15o, it reaches a range of 100 yards. At what other angle should it projected to reach the same range? Assume the same initial speed.a. 90 degrees
b. 45 degrees
c. zero degree
d. more than 45 degrees but less than 90 degrees
a. 75 o
b. 45 o
c. 0 o
d. 90 o
22) A ball is shot horizontally from the roof of a building. At the same time another ball is dropped from the same height. Which one reaches the ground first? (neglect air resistance)
a. the shot ball
b. the dropped ball
c. both at the same time
d. ... it depends on the weight difference between the two balls
23) A football is thrown as a long pass. When it reaches its maximum height, its acceleration
a. goes to zero
b. starts increasing
c. starts decreasing
d. remains constant
24) Assuming no air resistance, why does an 8-km/s horizontally fired projectile not strike the earth’s surface?
a. the projectile falls 5 m every second for 8000 tangent line
b. the projectile has too large a speed. It will escape the earth’s gravity
c. the gravitational field of the earth pushes the projectile away from the earth
d. the speed is so large that the projectile will not be affected by the gravity of the earth
25) A lady bug sits halfway between the axis and the edge of a phonograph record. If the RPM speed is doubled, what will happen to the tangential speed of the bug?
a. the tangential speed will remain unchanged
b. the tangential speed is halved
c. the tangential speed is doubled
d. the tagential speed is quadupled