Motion Graphs
Forces
Newton's Laws
Simple Machines
Mass and Weight
100
What does the slope of the distance-time graph tell about the object's motion? What about the slope of the speed-time graph?
Distance-time graph: speed of the object
Speed-time graph: acceleration of the object
100
What does it mean for the forces on an object to be balanced (other than having a net force of 0)?
the object's motion does not change (constant velocity)
100
Match the Newton's Laws:
Newton's 1st Law action-reaction
Newton's 2nd Law law of inertia
Newton's 3rd Law law of acceleration(F=ma)
Newton's 1st Law -> law of inertia
Newton's 2nd Law -> law of acceleration(F=ma)
Newton's 3rd Law -> action-reaction
100
How can you increase the amount of work done?
A. Lifting the object higher
B. Lifting the object lower
C. Lifting an object with less weight
D. Lifting an object with more weight.
A, D
100
Which changes based on your location, mass or weight?
Weight
200
Which graph(s) shows a distance-time graph of an object NOT moving
Graphs A and B
200
What is the difference between balanced and unbalanced forces?
Balanced forces do not cause a change in motion and unbalanced forces do
200
You bounce a ball off the ground with the same height but different forces and recorded the results. Which ball required the most force?
Bounce #4
200
A student helps his teacher lift a 200 N box of books 1.2 m from the floor to the desktop. How much work does he do?
240 J
200
What is the force of gravity (the weight) of an object that is 4 kg?
F = m x a
(a = 9.8 m/s2)
F = (3)(9.8) = 39.2 N
300
Which graph shows a speed-time graph accelerating?
Graph C
300
Why does a crumpled piece of paper hit the ground before the flat piece of paper?
The flat paper has more air resistance or the crumpled paper has less air resistance
300
Which scenario describes Newton's 3rd Law?
A. a boy throws a dodgeball at his friend
B. water falling down a cliff to form a waterfall
C. a golf ball at rest on the greenway
D. A fireman being knocked back after he turns on the water hose
D. A fireman being knocked back after he turns on the water hose
300
What is the trade-off for using an inclined plane to move a wheelbarrow?
A. You use less force, but move the same distance
B. You use more force, but move less distance
C. You use less force, but move more distance
C. You use less force, but move more distance
300
How does the mass of an astronaut on Earth compare to that same astronaut on Mars?
The mass will stay the same?
400
Calculate the acceleration of this graph. Use the correct units.
4 m/s2
400
Which box is NOT moving?
Box 2
400
Which type of ball will travel farther when launched with the tennis ball launcher? Why?
The tennis ball because it has less mass. It won't travel as far.
400
What is effort force?
A. the force you are lifting
B. the force you put in to lift something
B. the force you put in to lift something
400
True or False: Bringing 35 kg reindeer to the moon from the Earth will change its mass.
False, the mass will not change
500
Tell me a story that matches the motion of this graph.
answers will vary. I will decide if it's correct.
500
If dropped in a vacuum, which object will hit the ground first?
They hit the ground at the same time because there's no air resistance
500
At an event demonstrating old cannons, four different cannons are fired. The cannon balls used in the cannons are spherical lead balls with different masses. The cannonballs are fired at exactly the same angle with exactly the same amount of force. Which cannonball will go the farthest?
Cannon A
500
Which lever would be best to use to give the most mechanical advantage (Hint: which one makes the tree easier to lift?)
B
500
NASA launches a space probe with a mass of 15,000 kg to a planet larger than Earth. Which statement is true about the space probe once it has reached the other planet?
A. the mass will increase
B. the mass will decrease
C. the weight will increase
D. the weight will decrease
C. the weight will increase