Moving in Circles
Newton's Laws
Gravitational Force
Objects in Motion
Scientific Notation
100
Which arrow represents the force keeping this object in motion around the star?
2
100
According to Newton's 1st law, an object in motion ________ until _________.
An object in motion stays in motion until acted upon by an outside force.
100
What is the formula used to solve for weight of an object on Earth?
F = mg
100
A rock is dropped from a window 5 m above the ground. The rock hits the ground 1.0 s later with a speed of 10 m/s.What is the average speed of the rock during this time?
5 m/s
100
Convert 5.3x10^7 to regular notation.
53,000,000
200
Which arrow represents the force keeping this object moving in a circle? AND what is this force called?
Z; Centripetal Force
200
Give Newton's 2nd Law in both equation and verbal (words) format.
F=ma; putting a net force on an object will cause it to accelerate.
200
Which arrow represents the direction of the force that keeps the planet in its orbit?
X
200
An astronaut is making repairs on a satellite in space. The astronaut bumps against the satellite, causing a part to break off. Describe the motion of the part after it breaks off the satellite.
A straight path until acted upon by an outside force.
200
Convert 100 to scientific notation.
1x10^2
300
When the string is released, in which direction will the ball travel?
X
300
What are the direction and magnitude of the reaction force to the action of Box 1 pushing on Box 2?
To the left, same magnitude as the push force.
300
If the moon used to be 2x closer to the Earth than it is now, how many times larger or smaller was its force on the Earth compared to today?
4 times larger
300
Based on this graph, when is kinetic friction acting on the car?
During Y and Z
300
Convert 5.3x10^0 to regular notation
5.3
400
Does an object move faster on a longer string or a shorter string? How do you know?
The longer string. If the number of rotations per second is the same for both, the object on a longer string must cover more distance in less time (s=d/t).
400
Pluto orbits the sun. Which force is larger: the force of Pluto on the sun or the force of the sun on Pluto?
Neither; they are the same force!
400
A planet with a radius equal to that of Earth has twice the mass of Earth. If an object weighs 800 N on Earth’s surface, how much will it weigh on the other planet?
1600N
400
A satellite in a circular orbit around Earth has a constant speed but not a constant velocity. Why is its velocity not constant?
Its direction is continuously changing.
400
Convert 6.02x10^23 to regular notation
602,000,000,000,000,000,000,000
500
Why does the moon orbit the Earth rather than the other way around? Use a formula to support your answer!
Because the moon has less mass. When force is the same, the moon must accelerate much more than the Earth (F=ma).
500
Two students are standing next to each other on a level field. One of the students throws a table tennis ball forward toward a line 2.0 m away. At the same time, the second student throws a bowling ball in the same direction. Both balls take the same time to travel the 2.0 m.Only the second student feels a noticeable backward push when she throws her ball. Why did only the second student feels a noticeable backward push?
The bowling ball gives a larger reaction force than the table tennis ball.
500
The Earth has a mass of 6x10^24 kg. The moon has a mass of 7.3x10^22 kg. The average distance from the center of the Earth to the center of the moon is 3.84x10^5 km. Find the gravitational force between the two.
1.98x10^26 N
500
A student pushes a book across a classroom table. What is the difference between the amount of force needed to start the book moving and the amount of force needed to keep it moving and why?
More force is needed to start moving the book, because static friction is greater than kinetic friction.
500
Convert 301,000,000,000,000 to scientific notation.
3.01x10^14