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WorksheetsCBA 2 Review (Unit 3)
Total questions: 16
Worksheet time: 27mins
(8.6A) For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table below. Which of these best explains the students data?
The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp
The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity
The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced
The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced
(8.6A) The diagram below shows a sled moving along a smooth, frictionless track. In which sections of the track will the sled experience an unbalanced force?
Section 1 and 3
Section 2 and 3
Section 2 and 4
Section 3 and 4
(6.8A) The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50 m higher than Airplane X. Which statement best describes the energy of the two airplanes?
Airplane W has a greater kinetic energy than Airplane X
The two airplanes have the same gravitational potential but different kinetic energies
Airplane X has gravitational potential energy than Airplane W
The two airplanes have the same kinetic energy but different gravitational potential energies
(6.8A) A bicycle rider is travelling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram shows the rider in three different positions. Which of these correctly describes the potential and kinetic energy of the bicycle rider?
When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least
As the rider moves up the hill, her kinetic energy increases and her potential energy decreases
When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases
As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease
(8.6B) What is the difference between the velocity and the speed of an object?
Velocity is the change in distance over time, while speed is the change in velocity over time
Velocity has a direction associated with it, while speed has no specific direction
Velocity has no direction associated with it, while speed has a specific direction
Velocity is the change in speed over time, while speed is the change in distance over time
(8.6B) A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013. Because the meteor was only 45 m wide and was 27,700 km above Earth's surface, it was not visible without the aid of a telescope. Which statement describes the meteor's motion?
Its velocity was 7.8 km/s northward
Its acceleration was 468 s2km
Its speed was 468 km/s northward
Its acceleration was 7.8 s2km
(6.8C) Some students were investigating the speed of a toy car they built. They performed two trials and recorded their data in the table below. What was the average speed of the toy car during the two trials to the nearest tenth of a m/s?
Speed = TimeDistance1.4 m/s
0.71 m/s
(6.8C) A student walks 2 km in 30 minutes. What is the student’s average speed in km/h?
Speed = TimeDistance0.07 km/h
4 km/h
(6.8D) A hobbyist collected data about the motion of a toy train on a straight track and then recorded the data in the graph below. Which of these accurately describes the motion of the toy train?
The toy train speeds up while going forward and then slows down
The toy train slows down while going forward then moves backward
The toy train moves forward at a constant speed, slows down, and then stops
The toy train moves forward at an increasing speed, stopes, then moves forward
(6.8D) A car travels at a constant speed of 15 m/s for 2 minutes. The car increases its speed from 15 to 25 m/s the next minute and then travels at a constant speed of 25 m/s for 2 more minutes. Which of the following graphs best represents the car's motion during this 5-minute period?
(6.9C) The main parts of a working clothes dryer are shown in the diagram. This appliance dries clothes primarily by converting -
electrical energy to heat and mechanical energy
mechanical energy to heat and electrical energy
electrical energy to heat and light
mechanical energy to heat and vaporization
(6.9C) When a lion eats a zebra and then uses the energy from the zebra to run, the lion's body converts -
Chemical energy to mechanical energy
electrical energy to chemical energy
chemical energy to light energy
mechanical energy to chemical energy
(6.9C) A cook heats a meal in a microwave oven. What energy transformations occur between the microwave oven and the meal?
Electrical energy → light energy → chemical energy
Chemical energy → thermal energy → light energy
Electrical energy → electromagnetic energy → thermal energy
Chemical Energy → electromagnetic energy → chemical energy
(6.8D) The graph shows the distance an object traveled in 11 seconds. Which answer choice best describes the movement of the object between the times of 0 and 6 seconds on the graph?
Moving at a constant speed
Accelerating
Moving toward the north
Stopped
(8.6A) A mother and daughter press their hands together and then push apart while ice skating. Immediately after they push away from each other, how does the motion of the mother and daughter change?
The mother moves forward, and the daughter moves backward with a greater acceleration
Both move forward, but the mother moves with a greater acceleration
The mother moves backward, and the daughter moves forward with a greater acceleration
Both move backward, but the daughter moves with a greater acceleration
(8.6B) Which of the following best describes the velocity of an object?
30 m/s
30 m east
30 m/s east
30 m/s2
