Questions and answers by

uyth

Questions (49)

A coin (5 grams), a small parachute (21 grams), and a hammer (710 grams) are all dropped from a height of 10 meters. The coin
1. 1 answer
2. 126 views
A hammer and a feather are dropped from the same height. Imagine that there is no resistance to the objects' motion in air.
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2. 86 views
A science class is conducting an investigation to see how gravity affects objects of different masses. They drop three balls
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2. 61 views
A student conducts an investigation to study the effect of gravity on objects of different masses. Which step should be first in
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2. 91 views
Use the table to answer the question.Planet Estimated Mass of Planet (1024 kg) Venus 4.87 Mars 0.642 Jupiter 1,898.0 Neptune
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2. 99 views
Which statement about gravitational attraction is correct?(1 point)Responses All objects with mass experience gravitational
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2. 132 views
Why does a beach ball weigh less than a bowling ball?(1 point)Responses The beach ball pushes harder against Earth. The beach
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2. 69 views
Which force acts on falling objects to oppose gravity?(1 point)Responses air resistance air resistance acceleration acceleration
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2. 112 views
Groups of skydivers need to navigate through the air during a jump to get into a formation. How can skydivers who are below the
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2. 95 views
A nickel and a sheet of paper, which have approximately the same mass, are dropped at the same time from the same height. The
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2. 101 views
Which statement explains why astronauts appear to bounce when they are walking on the moon?(1 point)Responses The force of air
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2. 74 views
What could a skydiver do to slow down their fall?
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2. 55 views
What happens when a skydiver opens their parachute?
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2. 47 views
When the force of air resistance is equal to the force of gravity, an object will stop accelerating and fall at a constant
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2. 76 views
Which will experience more air resistance: a flat sheet of paper or a piece of paper crumpled up into a ball? Why?
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2. 125 views
Explain the relationship between gravitational attraction and mass.
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2. 59 views
Sylvia is a budget analyst for the state of Kentucky. Her job is to look over the state government’s spending and suggest ways
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2. 92 views
QuestionThe muscular system allows our bones to (1 point) Responses strengthen. strengthen. contract. contract. lengthen.
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2. 72 views
A hammer and a feather are dropped from the same height by an astronaut on a planet without air. How will their falls compare?(1
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2. 122 views
Use the table of data for two falling rocks to answer the question.Rock 1 Rock 2 Mass (kg) 2.5 25 Height of Fall (m) 78.4 78.4
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2. 112 views
A shoe and a shirt are released from the same height. They take different amounts of time to fall to the ground. How can this be
1. 1 answer
2. 59 views
Which has more air resistance: a flat sheet of paper or a paper airplane? (1 point)Responses a sheet of paper because it has a
1. 1 answer
2. 78 views
Use the table of criteria for an investigation to answer the question.Object To Be Dropped Drop Height (meters) 10-gram ball 5
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2. 87 views
Investigating Gravity Quick Check3 of 43 of 4 Items Question Use the table of data from an investigation on the effect of
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2. 109 views
QuestionA student wants to know if the effect of gravity is the same on all objects. She follows these steps: Drop a 5-gram
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2. 79 views
Use the table of data from an investigation to answer the question.Mass of ball (grams) Time to hit ground (seconds) 10 1.02 15
1. 1 answer
2. 59 views
When you hold a textbook and a pencil, why does the textbook feel heavier than the pencil?(1 point)Responses You can grip the
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2. 60 views
When you jump, you exert a pushing force against the ground. Gravity pulls you back down. Why can a person jump higher on the
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2. 90 views
Use the table to answer the question.Planet Estimated Mass of Planet (1023 kg) W 6.4 X 3.3 Y 59.7 Z 48.7 Assuming these planets
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2. 117 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)Responses 80% 80% 60% 60%
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2. 76 views
A certain lever system is only 30% efficient. What could make it more efficient? (1 point)Responses Use a stiffer lever to
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2. 60 views
QuestionHow does a pulley make work easier when it is used to lift an object?(1 point) Responses It reduces the weight of the
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2. 82 views
Use the table to answer the question.Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000 5,000
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2. 120 views
Use the image of a person lifting a boulder with a lever to answer the question.An illustration shows a man using a stick and a
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2. 106 views
Force and Work Unit Test6 of 126 of 12 Items Question A person is lifting a heavy box using a lever. What is the purpose of the
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2. 83 views
A person using a lever applies 98 Newtons to lift a 20-kilogram box. They apply the force over a distance of 4 meters to lift
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2. 91 views
How do simple machines make work easier?(1 point)Responses They decrease the distance needed between a person and an object,
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2. 133 views
QuestionWhich list correctly orders effort (E), fulcrum (F), and load (L) for each lever class?(1 point) Responses class 1 = F,
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2. 139 views
Use the diagram of the pulley system to complete the statement.An illustration shows a system of two pulleys lifting a block. In
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2. 125 views
A person pushes a box. He applies a force of 400 newtons, and he pushes the box for a distance of 4 meters. After he stops
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2. 118 views
What makes LED light bulbs more efficient than incandescent bulbs?
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2. 50 views
Is it possible for the Efficiency to be greater than 100%? Why or why not?
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2. 54 views
What is output energy?
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2. 59 views
What is input energy?
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2. 53 views
In your own words, what is the definition of ”the efficiency of a machine?”
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2. 67 views
How is a shovel an example of a class 3 lever?
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2. 64 views
Describe a class 3 lever and give one example of a class 3 lever.
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2. 47 views
Describe a class 2 lever and give one example of a class 2 lever..
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2. 49 views
How is using a screwdriver to open a paint can an example of a class 1 lever?
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2. 59 views