Energy
Forces
Speed and Velocity
More Forces and Misc.
Mischallaneous
100
Kinetic energy of an object depends on which, if either, of the object's mass and velocity? A. Mass only B. Velocity C. Mass and Velocity D. Neither mass nor velocity
What is mass and velocity? (Choice C)
100
A tree branch floating on water has a force acting on the branch from the water. What is the other force acting on this branch? A. the buoyant force B. gravity C. the branch's weight D. drag
What is the branch's weight? (Choice C)
100
How can you tell on a velocity vs. time graph where acceleration is the greatest? A. where the slope is the most gentle B. where the slope is the steepest
What is the steepest slope? (Choice B)
100
There are 4 forces acting on an object, 18 N in the upward direction, 18 N in the downward direction, 36 N in the left direction, and 12 N in the right direction. The net force acting on the object is: A. 24 N in the left direction B. 24 N in the right direction C. 18 N in the left direction D. 18 N in the right direction
What is 24 N in the left direction? (Choice A)
100
If an object has a mass of 120 g and a volume 50 mL, what is its density? A. 0.42 g/mL B. 2.4 g/mL C. 6000 g/mL D. 24 g/mL
What is 2.4 g/mL? (Choice B)
200
Spheres A and B have the same diameter but Sphere A is two times as heavy as Sphere B. If the spheres are placed on a flat surface side by side, compared to Sphere A's gravitational potential energy, Sphere B's gravitational potential energy will be: A. four times as much B. two times as much C. the same D. less
What is less? (Choice D)
200
Three bricks with the same weight but different dimensions are placed on the ground. The force exerted by the ground on which of these bricks, if any, will be the greatest in magnitude? A. The force exerted by the ground on each of the bricks will be the same in magnitude B. The widest brick C. The longest brick D. The tallest brick
What is "the force exerted by the ground on each of the bricks will be the same in magnitude"? (Choice A)
200
If a person moves at 30 m/s for 10 s, how much distance will be covered? A. 0 m B. 150 m C. 300 m D. 600 m
What is 600 m? (Choice D)
200
Suppose a tennis player's racket makes contact with a tennis ball. Compared to the magnitude of the force exerted by the ball on the racket, the magnitude of the force exerted by the racket on the ball will be: A. less only B. greater only C. equal D. less or greater depending on the type of tennis shot
What is equal? (Choice C)
200
If a falling object moves from height 1 and height 2 and height 2 is lower than height 1, what could be said about the sum of potential and kinetic energy? A. it remains the same because the increase in the potential energy cancels out the decrease in the kinetic energy B. it remains the same because the decrease in the potential energy cancels out the increase in the kinetic energy C. It increases because the increase in the potential energy is greater than the decrease in kinetic energy D. It decreases because the decrease in the potential energy is greater than the increase in the kinetic energy
What is "it remains the same because the decrease in the potential energy cancels out the increase in the kinetic energy"? (Choice B)
300
A rollercoaster car covered the distance from Point A to Point B in its track. At both these points, the rollercoaster car had nonzero potential and kinetic energies. The difference between the car's potential and kinetic energies (potential minus kinetic energy) increased in going from Point A to Point B. Based on this information, which of the following conclusions, if any, would be made about the relative locations of Point A to Point B? A. Point A was located higher than Point B B. Point A was located lower than Point B C. Points A and B were located at the same height D. The information is insignificant to make a conclusion
What is "Point A was located lower than Point B"? (Choice B)
300
Which of following best represents the forces acting on a flower vase standing still on a table? A. Weight pushing upward, the normal force pushing downward with equal magnitude B. Normal force pushing upward, weight pushing downward with equal magnitude C. Weight pushing upward, normal force pushing downward with a greater magnitude D. Normal force pushing upward, weight pushing downward with a greater magnitude
What is "Normal force pushing upward, weight pushing downward with equal magnitude"? (Choice B)
300
The difference between speed and velocity is A. velocity represents magnitude and direction B. velocity only represents the magnitude C. velocity only represents the direction D. speed represents the magnitude and direction
What is "velocity represents magnitude and direction"? (Choice A)
300
Consider an object in two different situations, while moving at a constant speed in a straight line in the same direction (Situation 1) and while at rest (Situation 2). The object will have inertia in: A. Situation 1 but not situation 2 B. Situation 2 but not situation 1 C. Situation 1 and 2 D. Neither situation 1 nor situation 2
What is situation 1 and 2? (Choice C)
300
In which of the following pairs of energy sources are both energy sources carbon-based? A. hydropower, coal B. wind, natural gas C. solar, geothermal D. biomass, oil
What is biomass, oil? (Choice D)
400
Kinetic energy is measured in joules. A joule (J) is equivalent to which of the following units? A. kg X (m/s)2 B. kg2 X (m/s) C. (m/s)2/kg D. (m/s)/kg2
What is kg X (m/s)2? (Choice A)
400
Which of the following changes in the net force acting on an object would cause the object's acceleration to decrease three times? A. Increasing the net force three times B. Decreasing the net force three times C. Increasing the net force nine times D. Decreasing the net force nine times
What is "decreasing the net force three times"? (Choice B)
400
Which of the following calculations converts 30 m/s into km/hr? A. 30/(1000 x 3600) B. (30 X 1000)/3600 C. (30 X 3600)/1000 D. (1000 X 3600)/30
What is (30 X 3600)/1000? (Choice C)
400
When a crane lifts a crate from the ground vertically straight up through a certain distance, the work done by the crane is equal to: A. the weight of the crate times the distance through which the crate is lifted B. the weight of the crate times the square of the distance through which the crane is lifted C. the mass of the crate times the distance through which the crate is lifted D. the mass of the crate times the square of the distance through which the crate is lifted
What is the weight of the crate times the distance through which the crate is lifted? (Choice A)
400
Of the properties mass and weight of an object on Earth, which, if either, would change on the Moon? A. Mass only B. Weight only C. Mass as well as weight D. Neither mass nor weight
What is weight only? (Choice B)
500
Suppose the efficiencies of two energy conversion devices are different and one the devices has an efficiency of 100%. Given this information, it will be best concluded that in the case of the other device, the: A. useful energy output exceeds the total energy input B. useful energy output is less than the total energy input C. the total energy output exceeds the total energy input D. the total energy output is less than the total energy input
What is "useful energy output is less than the total energy input"? (Choice B)
500
An object is moving in a straight line at a constant speed without changing direction. Based only on this information, which of the following conclusions will best be made about the forces acting on this object? A. they all have the same magnitude B. They all have the same direction C. Their sum is nonzero D. Their sum is zero
What is "their sum is zero"? (Choice D)
500
What is the velocity of a runner who runs 10 km West in 50 minutes? A. 5 km/min B. 0.2 km/hr C. 0.2 km/min D. 5 km/hr
What is 0.2 km/min? (Choice C)
500
As electromagnetic radiation travels from the Sun to Earth, how do green and orange radiations compare in wavelength and speed? A. The green radiation consists of longer wavelengths than does the orange radiation and travels slower than the orange radiation B. The green radiation consists of shorter wavelengths than does the orange radiation and travels faster C. The green radiation consists of longer wavelengths than does the orange radiation and travels at the same speed D. The green radiation consists of shorter wavelengths than does the orange and travels at the same speed
What is the green radiation consists of shorter wavelengths than does the orange and travels at the same speed? (Choice D)
500
Which type of energy is converted into electricity in a silicon photocell? A. Electromagnetic B. Chemical C. Nuclear D. Mechanical
What is electromagnetic? (Choice A)
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