Energy/Work/Power
Momentum/collisions
Newton's Laws, Net Force, FBDs
Vectors/Kinematics
Electricity, Magnetism, Waves
100
What law tells you that you can set initial energy = final energy?
Conservation of Energy
100
What law tells you that you can set initial momentum = final momentum?
Conservation of Momentum
100
A 3000kg car drives down the road at 30m/s. What is the net force on the car?
0N
100
What formula do we use to add vectors together?
Pythagorean Theorem
100
What law tells us the relationship between voltage, current, and resistance in a circuit?
Ohms Law (V=IR)
200
30J of work is done to move a box 6m across the floor. How much force was applied to the box?
5N
200
A 3000kg car is driving next to a 5000kg truck at 32m/s. How much more momentum does the truck have than the car?
64,000 kg m/s
200
Draw the free body diagram for a block at rest on an incline
See Slide 1
200
2 people are pushing on a block as shown. What is the net force?
50N
200
An electric current produces a _________ field and a _______ magnetic field produces an electric current.
Magnetic, changing
300
What material requires 316 J of energy to heat 8g of it up from 22o to 72o?
Granite
300
A force of 3N is applied to a box for 5 seconds to speed it up. How much does the box's momentum change?
15 kg m/s
300
A 2500kg car hits its gas and accelerates at 6 m/s2. How much force did the car's engine supply to speed it up?
15,000 N
300
What is the x-component of the vector shown below (round to 1 decimal place)
258.9 N
300
You have a laser that produces light with a wavelength of 2 x 10-5 m. How much energy does a photon of this light contain?
9.9 x 10-21 J
400
A machine that is 80% efficient produces 20W of power. How much electrical energy was required to power this machine for 5 seconds?
125 J
400
A 2000kg car is driving at 10 m/s. It hits its breaks and applies a force of 500N for 8s to slow itself down. How fast is it going?
8 m/s
400
You are 80kg and are sitting on a swing. How much upward tension force is in each of the two chains?
392 N
400
A rock takes 3.2 seconds to fall from the roof of a building to the floor. To the nearest meter, how tall is the building?
50 m
400
3A flows through a circuit when it is connected to a 6V battery. The resistance of the circuit is doubled and it is plugged into a 40V battery. How much current flows through?
10 A
500
A 2kg rock has 300 J of ME at the top of a cliff. It is tossed off the cliff and when it is 3m from the ground, it has 60 J of PE. How fast is it going (round to the 10ths place)?
15.5 m/s
500
A 20kg cart moving at 12m/s slams into a stationary 10kg cart. The two carts stick together after the collision. How fast is the two-cart system moving?
8 m/s
500
You swing a 3kg ball on a 2m string around your head as shown below. How much tension force is in the string if the ball is moving at 4 m/s?
24 N
500
A projectile is launched horizontally off of a 30m building with a velocity of 18 m/s as shown. How far away from the base of the building will it hit the ground?
44.5 m
500
You shine a laser onto a diamond prism at an angle of 80o. You measure the angle of refraction to be 36.6o. What substance are you standing in?
Oil