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1D - Motion
Newton's Laws
Mechanical Energy
Sound
Electric Circuits
100
The term "uniform motion" means...
the objective is travelling with constant velocity.
100
Due to air resistance, a skydiver will reach a maximum speed called ____________________ and not continue to accelerate.
Terminal Velocity
100
If a stone falls vertically downward from a roof 20 m above the ground to a vehicle 2 m above the ground, the car is known as the ____________________.
Reference Level
100
A car horn is located due north of where you are standing. The sound transmitted to your ears is caused by air particles moving in what direction?
North-South direction only
100
Name all of the particles in an atom and identify their associated charges.
Proton (+), Electron (-), Neutron (0)
200
A cyclist rides a bicycle 4.0 km west, then 3.0 km north. What is the cyclist's displacement?
5.0 km [37° N of W]
200
Describe the differences between Newton's First and Second Laws, with regards to: Acceleration, Net Force, Velocity, and Motion
1st Law: No Acceleration, Net Force = 0 N, Velocity is constant (or is 0 m/s), "Uniform Motion" 2nd Law: Acceleration Exists, Net Force > 0 N, Velocity is changing (not constant), "Non-Uniform Motion"
200
What is the amount of work done to stop a bullet travelling through a tree trunk a distance of 50 cm with a force of 200 N
(-) 100 J
200
A bob on a vertical spring bounces up and down to produce a longitudinal wave in the spring. If the distance in height between the bob's highest and lowest position is 12 cm, what is the amplitude of the generated wave?
6 cm
200
What are the SI units for Electric Potential, Current, and Resistance? Also provide an alternative for each unit that is derived from other SI units.
Volts (V) = (J/C), Ampere (A) = (C/s), Ohm = (V/A)
300
Draw and describe what a velocity-time graph would look like for an object travelling with uniform motion.
The graph would be a straight horizontal line.
300
Draw a FBD for a 2000-kg elevator which has a cable attached to the top. What is the motion of the elevator if the tension in the cable is 19,600 N?
The elevator must not be accelerating.
300
A 15-kg load of groceries is lifted up from the ground to the fifth floor of an apartment building. Each floor is 5.00 m high. The potential energy of the groceries with respect to the second floor is...
3680 J
300
An object completes 240 cycles in 15 s. What is its frequency, in hertz?
16 Hz
300
How much work is done on 10.0 C of charge to move it through a potential difference of 9.0 V in 10.0 s?
90 J
400
A sprinter who is competing in a 100-m race accelerates from rest to a top speed of 10.0 m/s over a distance of 15 m. The remainder of the race is run at a constant speed. What is the sprinter's time for the entire race?
The sprinter's time for the race is 11.5 s.
400
A bicycle of mass 14.6 kg and a rider of mass 50 kg generate a net force of 12 N. How fast are they going after 2 seconds?
0.38 m/s
400
A hammer with a gravitational potential energy of 15.0 J at 10.0 m above the ground falls from rest. At a height of 5.00 m the speed of the hammer is 10.0 m/s. The total mechanical energy of the hammer at 5.00 m is ____________________.
15 J
400
Calculate the period and frequency of a pendulum that completes 150 vibrations in 1.5 min.
The period is 0.60 s and the frequency is 1.7 Hz.
400
A 125-V circuit contains a 10.0-ohm resistor. What resistance must be added in series for the circuit to have a current of 5.00 A?
A resistance of 14-ohm must be added.
500
A car is travelling along a highway with a speed of 25 m/s when the driver sees an obstruction 180 m directly ahead. It takes the driver 0.80 s to react and begin braking. What is the value of the acceleration of the car if it just misses hitting the obstruction? (Assume the acceleration is uniform.0
The acceleration is –2.0 m/s^2.
500
A 2.0-kg object is sliding across a smooth surface at 4.0 m/s when it collides with a stationary 3.0-kg object. The collision lasts for 0.80 s after which the smaller object has slowed to a speed of 1.0 m/s. Determine the speed of the larger object immediately following the collision.
2.0 m/s
500
A 140-kg barrel that is initially at rest is pushed by a constant net force of 40.0 N. The barrel travels 200 cm in 5.0 s. The acceleration of the barrel is 0.25 m/s^2. Calculate the increase in kinetic energy during the 5.0 s.
The increase in kinetic energy during the 5.0 s is 70 J.
500
The distance between two successive crests in a wave is 1.5 m, and the source generates 25 crests and 25 troughs in 5.0 s. What is the speed of the waves?
The speed of the waves is 7.5 m/s.
500
An electron has a mass of 9.11 x 10^–31 kg. Originally, it is at rest. What speed will the electron have after it is accelerated though a potential difference of 5670 V?
4.46 x10^7 m/s