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WorksheetsUnit 5 Energy, forces, motion
Total questions: 12
Worksheet time: 1hrs 10mins
In order for a space shuttle to leave Earth, it must produce a great amount of thrust. Its rocket boosters create this thrusting force by burning great amounts of fuel. However, once in space, the shuttle needs very little fuel. It circles Earth while gravity pulls it toward Earth. What term describes the motion of the shuttle around Earth?
orbit
gravity
inertia
weight
A weather station records the wind blowing from the northeast at 12 km/h. Which statement explains why northeast at 12 km/h is a vector?
The speed is given in km/h.
The speed is a constant value.
Speed and direction are given
An average speed is reported.
One ball rolls along a shelf at a steady rate. A second ball rolls off the shelf and gains speed as it falls in a curved path. Which must have an unbalanced force acting on it?
the ball that is rolling along the shelf
the ball that is falling
both balls
neither ball
Penny says that dust particles in space cannot be pulled together by the force of gravity because dust particles have very little mass. Ella says that as long as dust particles have mass at all, the force of gravity can pull dust particles toward each other. Who has the better argument, and why?
Penny, because objects with only a little mass are not affected by gravity.
Penny, because dust particles in space are not orbiting Earth.
Ella, because any two objects exert a gravitational force on each other
Ella, because objects with smaller mass have more gravity acting on them
Luis is trying to push a box of new soccer balls across the floor. In the illustration, the arrow on the box is a vector representing the force that Luis exerts.
If the box is not moving, which of the following must be true?
The box is exerting a larger force on Luis than he is exerting on the box.
There is another force acting on the box that balances Luis’s force
Luis is applying a force that acts at a distance
There is no force of friction acting on the box.
Ignacio uses a hammer to hit a nail into a board on the floor. How does gravity make it easier to hammer the nail?
Gravity pushes the board up to help the nail go in.
Gravity pulls the board and the nail toward each other
Gravity pulls the hammer down so that it pushes on the nail
Gravity pulls the nail down but does not pull on the hammer.
Every moving object has kinetic energy. This illustration shows four vehicles. Assume that they are all traveling at the same speed on a highway.What do you know about the kinetic energy of the vehicles?
The motorcycle has the most kinetic energy because it is the vehicle with the least mass.
All of the vehicles have the same kinetic energy because they are moving at the same speed.
The delivery van has the greatest kinetic energy because its mass is greater than that of the other vehicles
The delivery van has the greatest kinetic energy because it has the most tires in contact with the pavement.
Andre boarded a train at Lincoln Station. The train left the station at 9:10 p.m. and traveled, without stopping, 6 miles to Union Station. What additional information does Andre need to find the average speed of the train from Lincoln Station to Union Station?
the direction the train traveled
the time the train left Union Station
the initial and maximum speeds of the train
the time the train arrived at Union Station
Measuring acceleration requires appropriate units. Scientists measure acceleration using a standardized set of units that are part of the SI system. Which are the SI units for acceleration?
N
m/s
m/s 2
kg·m/s
High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?
The moon is not as hot as the sun.
The moon has less mass than Earth
The moon has less mass than the sun.
The moon is closer to Earth than the sun
Blair and Aaron competed in a 400-m running race. Blair finished the race in 55 s and came in first. Aaron finished the race in 58 s and came in second. Which of the following must have been greater for Blair than for Aaron?
maximum speed during the race
average speed for the entire race
speed for the last 100 m of the race
speed for the first 100 m of the race
When a pendulum is released, it swings back and forth. The speed and position change throughout each swing. This illustration identifies three positions of a pendulum during its swing. At which point does the pendulum weight have the greatest amount of mechanical energy?
position 1
position 2
position 3
Mechanical energy does not change
