Motion
Forces
Energy
Thermal Energy
Work and machines
100
Calculate the speed of a swimmer who swims 150 m in 88 s.
What is 1.7m/s
100
A net force of 2500 N acts on an African male elephant with a mass of 7000 kg. What is the acceleration of the African male elephant?
What is 0.36m/s squared
100
The effect of friction is to convert kinetic energy to _______.
What is thermal energy
100
When you measure the temperature of an object, you are measuring _______.
What is the specific heat of the object
100
How much work do you do when you lift your 10.0 kg sister to a height of 1.5 m?
What is 150 J
200
Calculate the speed of a swimmer who swims 1000 m in 88 s
What is 11.3m/s
200
If you swing a large washer on a string in a circle, the net force is
What is away from your hand
200
What is the kinetic energy of a 1000 kg car traveling at 20 m/s _______.
What is 400,000 J
200
Which of the following substances has the highest specific heat? A) glass B) iron C) water D) carbon
What is water
200
When a machine does work on an object the output work is
What is always less than the input work.
300
Calculate the speed of a car traveling 200 m in 50s
What is 4m/s
300
The amount of gravitational force exerted on an object is its _______.
What is velocity
300
A jogger whose mass is 65 kg is moving at a speed of 4 m/s. What is the jogger's kinetic energy?
What is 520 J
300
Which of these substances is likely to be the best insulator? A) ice B) steel C) oxygen D) water
What is oxygen
300
A machine can do any of the following, except A) increase work B) increase distance C) increase force D) change direction
What is increase work
400
A freight train travels from Miamistown to Fredericksburg, a distance of 680 km. If the route takes 12.2 h, what is the train's speed?
What is 55.7m/s
400
The rate at which an object falls depends on _______.
What is the force of gravity
400
A car moving at a speed of 20 m/s has a kinetic energy of 200,000 J. What is the car's mass?
What is 1000 kg
400
According the first law of thermodynamics, the increase in thermal energy of a system is equal to _______.
What is work done on the system plus heat added to the system
500
Newton's first law of motion states that
What is an object will remain at rest or keep moving unless a force acts on it
500
The force of gravity is exerted between Earth and an object _______.
What is at any distance
500
A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?
What is 8 m/s
500
Which of the following is most likely to conduct heat most efficiently? A) air B) wood C) metal D) fiberglass
What is metal
500
A runner impacts the ground with a force of 1083 N. If he runs a distance of 3000 m, how much work does the runner do?.
What is 3,249,000 J
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