Motion
Nancy walks 6 m from her house to the store. She then leaves the store and walks 3 m to the park. She then walks the remaining 3 m back to her house. What is Nancy's distance and displacement?
Distance = 12 m
Displacement = 0 m
F net = 5 N to the right
A roller coaster car is half way down the first hill. The gravitational potential energy at this position is 5 J. The kinetic energy at this position is 5 J. Calculate the mechanical energy of the roller coaster car at this position.
ME = 10 J
Calculate the voltage of a circuit that has a lightbulb with a resistance of 3 Ohms and 6 A of current is flowing through the circuit.
V = 18 V
The crest of a wave passes by a boat every 3 seconds. What is the period of the wave?
T = 3s
A train travels 300 m North in 100 s. What is the velocity of the car?
v = 3 m/s
A boy pushes on the wall with a force of 6 N to the right. What is the force exerted by the wall on the boy?
F = 6 N to the left
A 2 kg ball is at the top of a 5 m ramp. Calculate the gravitational potential energy of the ball.
PE = 98 or 100 J
Calculate the amount of current in a circuit that has a 6 V battery and a 5 Ohm resistor.
I = 1.2 A
A girl swings on a swing 4 times every 2 s. What is the frequency of the girl swinging?
A track start increases her velocity from 2 m/s to 3 m/s in 5 seconds. What is the track star's acceleration?
a = 1/5 or 0.2 m/s/s
The acceleration due to gravity on the moon is 1.6 m/s/s. How much would a 60 kg man weigh on the moon?
Fg = 96 N
A 50 kg rock is rolling down a mountain at a velocity of 3 m/s. Calculate the kinetic energy of the rock.
KE = 225 J
Calculate the resistance of a resistor that is connected to a 12 V battery and 10 A of current is passing through it.
R = 1.2 Ohms
Wavelength = 1.36 m
A car is traveling to the store which is 16 km away. The car stops at a light and then accelerates at 3 m/s/s for 5 s when the light turns green. What is the final velocity of the car after the 5 s?
vf = 15 m/s
F = 0.5 N
A 0.2 kg marble is moving with a velocity of 2 m/s towards another marble that is stationary. Calculate the total momentum of the two marbles before the collision.
p = 0.4 kgm/s
Calculate the voltage within a circuit that has 3 resistors connected in series that have resistances of 2, 4, and 5 Ohms and has 1.2 Amps of current flowing through it.
V = 13.2 V
A 15 kg sample of steel has a specific heat of 420 J/kgC. How much heat energy is required to heat the steel from 50 degrees C to 120 degrees C?
Q = 441000 J
An apple falls from a tree that is 15 m tall. How far has the apple fallen after 0.5 s?
delta x = 1.225 or 1.25 m
A 2 kg desk is pushed across the floor with a 4 N force. Calculate the acceleration of the desk.
Two train cars with equal masses of 2 kg each collide with each other. The blue car is traveling with a velocity of 3 m/s and the red car is stationary. What is the velocity of the red car after the collision if the two cars bounce off each other post collision and the blue car is now stationary?
v = 3 m/s
Calculate the amount of current passing through a circuit that has 2 resistors connected in series with 6 and 4 Ohms each and has a 12 V battery.
I = 1.2 A
A 2000 g barrel of water at 75 degrees C is left outside to cool. What is the final temperature of the water if 30000 J of energy is removed. Note the specific heat of water is 4.186 J/gC.