1) Which of the following best identifies and describes the force shown? a) The apple is being pulled toward the ground by gravity due to the strong gravitational force of Earth. b) The apple fell from the tree and toward the ground due to friction of the wind pushing past the apple. c) The apple is being pulled toward Earth due to the strong magnetic pull of Earth. d) The apple is being pushed toward Earth due to applied forces once it breaks free from the branch. 2) Magnetic force between the paper clip and magnet causes the paper clip to be pulled toward the magnet without the need for contact. Select all options that identify and describe the forces acting on the paper clip. a) Magnetic force between the paper clip and magnet causes the paper clip to be pulled toward the magnet without the need for contact. b) Normal contact force between the desk and paper clip before the paper clip is acted on by the magnet. c) Gravitational force pulls the paper clip down toward the Earth as it rests on the desk due to its great mass. d) Friction between the desk and paper clip causes it to stay still before the magnet acts upon it. 3) Choose all the examples that demonstrate the force of friction. a) A bike rolling down a hill b) Rubbing hands together to keep warm c) Air rushing over and around a car as it drives down the road d) A pot resting on a silicone pad to absorb heat from cooking 4) Identify the true statement(s) about the force that occurs between our planet and the moon that keeps the moon in orbit. Select all that apply. a) Gravity is an attractive-only force that pulls objects towards other objects. b) Magnetism between Earth and the moon is possible due to the composition of metals within Earth’s core. c) Friction is a contact or non-contact force that increases in strength as distance decreases. d) The greater the mass of an object, the greater the force of its gravity on other objects. 5) According to NASA, our moon moves approximately one inch away from Earth each year. If this pattern continues, how could the increased distance affect the strength of the force between Earth and the moon? a) As distance increases, the strength of the force would increase. b) As distance increases, the strength of the force would weaken. c) The strength of the force would increase and decrease due to other factors. d) The strength of the force would not change, because it is not dependent on distance 6) Identify and explain what forces act as a stationary bicycle rests on the pavement with its rider. Select all that apply. a) The gravitational force of Earth exerts a downward force on the bicycle and its rider. b) Normal force acts equal and opposite to the downward force of the bicycle and rider, and perpendicular to the contact surfac c) Normal forces are applied downward on the bicycle and rider and downward on the pavement during contact. d) Frictional force acts equal to and in the opposite direction of gravity at the time of contact to prevent solid objects from passing through each other.

Forces quiz

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