Multiple Choice
A push and a pull are two examples of which of the following?
A. Force
B. Velocity
C. Gravity
A. Force
True or False: mass and distance are two factors that affect gravitational pull
True
Newton's first law of motion states that an object at (blank) will stay at rest, and an object in (blank) will stay in motion
rest; motion
Explain what happens to the motion of an object when it experiences a balanced force
The motion of the object does not change
Mike rides a bike made by Company A. Luis rides a bike made by Company B. How can Mike and Luis determine in a scientific way whose bike has tires that last longer?
A. read information about the tires from each manufacturer
B. ask ten classmates who ride each bike which tires lasts longer
C. Test the bikes for 25 mi with a machine the same way and then compare the tires
C.
Which term means a force of attraction between two objects, even if they are not touching?
A. inertia
B. gravity
C. friction
B. gravity
True or False: balanced forces result in a slight change in motion of an object
False: unbalanced forces
(blank) is defined as forces that cause a change in motion
unbalanced force
Describe the relationship between gravity, mass, and distance
The more mass, the harder gravity will pull.
The more distance between two objects, the less gravity will pull
Which is a true statement about the work of engineers and the work of scientists?
A. engineers analyze data, and scientists do not
B. both follow a series of steps to find solutions to problems
C. both are interested in understanding the natural world
B
Which term identifies a force that opposes motion and acts between two objects that are touching?
A. inertia
B. gravity
C. friction
C. Friction
True or False: A spring scale measuring the force of a hanging block is measuring the force of friction
False: force of gravity
The more (blank) an object has, the more (blank) will be required to put the object in motion
mass; force
Why do Newton's laws of motion apply to objects in space despite the fact that objects in space look and feel weightless?
Newton's laws are based on an object's mass. Objects contain the same mass on earth as they do in space, meaning Newton's laws of motion still apply
Which of the following pieces of biotechnology helps improve one of the senses?
A. artificial heart
B. CAT scan
C. hearing aid
C
Which of the following gives the definition of inertia?
A. a sudden change in acceleration
B. a continuous downward force
C. the tendency of objects to resist a change in motion
C. the tendency of objects to resist a change in motion
True or False: Mindy wants to find out the average distance that each of six friends can throw a ball. She asks friends of similar sizes and ages to throw a ball as far as possible from the same starting point. Mindy notices that one friend throws the ball much farther than the other five do. She wants her results to be accurate. Mindy should not repeat her experiment
False: Mindy should repeat her experiment in order to collect accurate results
Newton's third law states that for every (blank) there is an equal, but opposite (blank)
action; reaction
Describe all three of Newton's laws
1: acceleration will not occur unless acted upon by an unbalanced force
2. acceleration depends on force and mass
3. All forces occur in pairs
Which of the following is an example of a physical change?
A. breaking a glass cup
B. toasting bread in the toaster
C. burning logs in a fire
A
Ryan bends a plastic ruler backward and then releases it to hit a button. Force from the ruler causes the button to slide across a table. Ryan bends the ruler back 4 cm for starting point 1, 6 cm for starting point 2, and 8 cm for starting point 3. What are the most likely results of his experiment?
A. point 1= 16 cm; point 2= 26 cm; point 3= 36 cm
B. point 1= 36 cm; point 2= 26 cm; point 3= 16 cm
C. point 1=16 cm; point 2= 16 cm, point 3= 16 cm
A. point 1= 16 cm; point 2= 26 cm; point 3= 36 cm
True or False: Newton's second law of motion describes Force in the following equation-
F= M + A
(Force= mass plus acceleration)
False: F=M x A
The forces exerted on a line of dominoes are (blank) when they are standing upright. When a falling domino hits them, the forces become (blank) and they fall over.
balanced; unbalanced
Travis is at the skatepark practicing tricks on the rails. As he is sliding on one of the rails, his skateboard gets caught on something and stops suddenly. What do you think happens to Travis after his skateboard stops moving. Use Newton's laws of motion and inertia to explain your answer
Peter places 6 balls of clay on one side of a balance. He places a plastic cup on the other side and finds that it takes 41 plastic cubes to balance the modeling clay. He then removes the 6 balls of clay and condenses them into 1 model dinosaur, and places it back on the scale. How many cubes will he need to balance the scale now?
A. about 35 cubes
B. about 47 cubes
C. exactly 41 cubes
C