Gravitation
The Moon is much smaller than the Sun. Why does the Moon have a greater effect on Earth’s tides?
Smaller distance between two celestial bodies
The product of mass and velocity.
What is linear momentum?
What is the equation for (gravitational) potential energy?
U_g = m· g· h
Angular velocity is a ____________ quantity because it includes speed and direction.
What is vector?
If Earth’s mass stayed the same but its radius became smaller, what would happen to gravity at its surface?
The gravitational force would increase
This states that the momentum of any closed, isolated system does not change
What is the law of conservation of momentum?
Taiju pushes a crate with 200 N of force across her 7-meter long lab in school. How much work does Taiju do on the crate?
What is 1400 J of work?
Will any solid cylinder ever roll down an incline with greater acceleration than any hollow cylinder?
What is no?
The time required for a planet to complete one revolution around its sun
What is orbital period?
What is the momentum of a 248-g rubber ball traveling at 30.0 m/s?
What is 7.44 kg m/s?
Senku pushes a crate (2 kg) from rest, doing 450 J of work on it, on a frictionless surface. How fast is the crate going at the end of this?
What is 21 m/s?
True or False:
A spinning wheel will maintain its angular velocity unless acted on by an external torque.
What is true?
Which planet has a greater orbital period, Venus or Neptune?
Neptune moves more slowly around the Sun because it is further away.
The total momentum after a perfectly inelastic collision.
The same as before
Suzie is planning to climb Mount Kilimanjaro (5895 meters). There's a steep trail that will take 4 days, and a longer trail with a moderate slope that will take 6 days. She's trying to determine which one will require less work. What trail should she take?
Either trail will require the same amount of work.
When a skater pulls their arms in and speeds up, what happens to their rotational inertia?
What is decreases?
Suppose a baseball is 1kg, what would be the gravitational force between two baseballs 1 meter apart?
6.67x10-11
How can a racing bicycle have the same linear momentum as a pickup truck?
You brought your phone (137 grams) to the top of the Grand Canyon (1857 meters) to take pictures of the view, and you accidentally drop it when you get to the top. How fast is your phone going right before it hits the water? Assume you lose 200 J to air resistance.
What is 183 m/s?
The torques are of two children on a seesaw are at perfect equilibrium. One child sits 1.3 m from the center and the other sits 1.2 m and weighs 45 kg. Determine the weight of the other child.
What is 41.5 kg?