Show:
Misc
Unit 1 Part 1
Unit 1 Part 2
Unit 2
Unit 3
100

What is the mass of an object when the weight is 3146 N?

321 kg

100
Explain what an acceleration of 21 m/s/s means.
The speed increases 21 m/s every second.
100

What happens to an astronauts a) mass and b) weight as she travels from the earth to the moon?

a) The mass is the same but b) the weight will decrease because the moon has less gravity.

100
How much work is done when a 500 N boy carries a 0.85 N ball across a field for 38 m?
0 J
100

What is true about the theory (that we learned about) regarding Earth's formation?

The opposite charges of the dust particles caused them to stick together.

Gravity caused the smaller rocks to hit each other, melt and stick to each other.

Water was present in the Nebula that formed Earth.

Earth's layers formed by the most dense molten layers heading toward the center.

200

If an astronaut has a mass of 82 kg on Earth, what is her mass on the moon?  The acceleration due to gravity on the moon is 1.63 m/s/s.

82 kg

200
Write an equation of the line for a Position depends on Time graph with a y-intercept of 65 m and a slope of -9 m/s.
position=-9m/s*time+65m
200
Describe Newton's First Law with a) velocity b) forces c) acceleration.
a) velocity is constant or 0 m/s b) forces are balanced c) acc=0 m/s/s
200
If a 0.55 kg ball is dropped with negligible resistance from 6.3 meters with 34 J of PE, how much KE will it have at the bottom of the cliff?
34 J
200

What is true of the later stages of high mass red supergiant stars?

They can become black holes or neutron stars

Can fuse elements from hydrogen to iron

Fusion slows, pressure decreases, gravity collapses the outer layers

The collapse produces a supernova and ejects elements into space

300

If an astronaut has a mass of 82 kg on Earth, what is her weight on the moon?  The acceleration due to gravity on the moon is 1.63 m/s/s.

134 N

300
If the equation of a line is Position=16m/s*time+4m where will the car be after 6 seconds?
100 m
300
Describe Newton's Second Law with a) velocity b) forces c) acceleration.
a) velocity is changing b) forces are not balanced c) acc is not 0 m/s/s
300
Explain what causes a solar eclipse
The moon is between the earth and the sun and the moon blocks out the sun casting a shadow on the earth.
300
What is happening on the main sequence of the H-R diagram?
Hydrogen is fusing (burning) to make Helium and producing energy.
400

What is the name of the process as an object is sucked into a black hole?

Spaghettification

400
The equation of a line is Position=-2m/s*time+40m a) Where did the car start? b) What direction did the car go in? c) What was the speed of the car?
a) at 40 m b) negative (or left) c) 2 m/s
400
Describe Newton's Third Law.
The forces between 2 objects are equal but in opposite directions and happen at the same time.
400
What is the amount of work done by friction if PE at the top of a ramp is 8.0 J and the KE at the bottom of the ramp is 3.5 J?
4.5 J
400
a) List 3 major characteristics of a Black Hole and b) explain what happens to something as it is sucked into them..
a) powered by gravity, strong but can only pull in things close to their horizon, they can't be seen directly b) an object sucked into a black hole will be stretched because gravity closest to the hole is stronger (spaghetification),and have a HUGE weight and HUGE acceleration because of the large gravity
500

If an object speeds up 38 m/s in 2 seconds, what is its acceleration?

19 m/s/s

500
The equation of a line is Position=6m/s*time-22m Describe the motion of the car including information about the starting position, direction and speed.
The car started at 22 m on the negative side and traveled in the positive direction at a speed of 6 m/s.
500
A 5000 N piano is lifted by a crane with a chain with a force of 6500N. Calculate the piano’s acceleration.
2.94 m/s/s
500
Explain what causes the Earth's seasons.
The Earth's axis is tilted.
500
a) What determines what a main sequence star will become next? b) List 2 possibilities.
a) The mass of the star on the main sequence. b) Super Giants or Giants