Force And Motion Question Preview (ID: 34736)
Force And Motion.
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A student wants to describe the velocity of a moving car. What information does the student need?
a) speed and position
b) speed and direction
c) direction and position
d) direction and relative motion
A car travels 160 km in 2 hours. What is the average speed of the car?
a) 0.01 km/hr
b) 80 km/hr
c) 160 km/hr
d) 320 km/hr
How is velocity different from speed?
a) Velocity includes force.
b) Velocity is always bigger.
c) Velocity includes direction.
d) Velocity is part of calculating speed.
Melinda crumples a sheet of paper into a small ball. She drops the crumpled ball of paper at the same time as she drops a flat sheet of paper. Why does the crumpled ball land before the sheet of paper?
a) Air resistance slows the flat sheet of paper.
b) Air resistance slows the flat sheet of paper.
c) The force of gravity on the ball is greater than on the sheet of paper.
d) Gravity acts on round objects only.
Jackson designed an experiment to test the effect of gravity on objects. He dropped a baseball and a marble at the same time from a height of two meters. What would the result have been if Jackson had decided to compare a baseball and a feather.
a) The feather would have landed first.
b) There would have been no difference in the result.
c) The result would not be valid because the objects are too different.
d) The baseball would have landed first.
Mrs. Sabel is pushing a wheelbarrow in her garden. If she continues to push with the same force, which of the following will cause the wheelbarrow to accelerate more slowly?
a) Greasing the wheel of the wheelbarrow
b) Moving the wheelbarrow onto a paved sidewalk
c) Adding a pile of dirt to the wheelbarrow
d) Holding the handles of the wheelbarrow with gloves
What is needed to give a large boulder a large acceleration?
a) A large inertia
b) A small inertia
c) A large force
d) A small force
Which of the following is not an example of accelerated motion?
a) An elevator speeding up
b) An elevator slowing down
c) A car driving at constant speed
d) A car driving around a curve at constant speed
Which of the following is an example of increasing friction intentionally?
a) waxing skis
b) adding grease to gears on a bike
c) throwing sand on an icy driveway
d) oiling a squeaky door
When an object’s position relative to another object is changing,
a) it is in motion.
b) it is speeding.
c) it has a high velocity.
d) it is accelerating.
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