4th Six Weeks Review 2 Question Preview (ID: 49777)


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What will happen to a biker's speed while a strong wind blows against him?
a) his speed will remain the same as he is applying the same force to the pedals.
b) his speed will double due to the second force being applied.
c) his speed will decrease since the wind is blowing towards him
d) his speed will increase due to stronger wind currents

To determine the distance to a storm, you count the seconds it takes to hear thunder after seeing the lightning and divide by 5. If it takes 15 seconds for the thunder to reach an observer 3 miles away, how fast is the thunder traveling?
a) .2
b) .5
c) 2.0
d) 5.0

Both the kinetic and potential energy of an object can be:
a) understood as the product of an object's mass and volume
b) recognized as forms of spent energy
c) measured in pounds
d) calculated using mathematical formulas

A cyclist works hard to reach the top of a hill and then coasts down the other side. Which statement best explains why the cyclist does NOT nee to work as hard when he travels downhill?
a) no energy is lost as heat when the cyclist rides downhill
b) potential energy is converted into kinetic energy as he moves downhill
c) kinetic energy is stored in the bicycle
d) there is less friction between the road and the bike as it moves downhill

A boy has three cubes made of different materials. All the cubes have the same dimensions. Which of the following is true?
a) the cube that is the least dense has the lowest temperature
b) the cube that is the most dense has the largest mass.
c) the colors of all of the cubes are the same
d) the masses of all the cubes are the same

What is a balls speed when rolling down a hill if it travels 10m and takes 50 seconds to get there.
a) .2
b) .5
c) 5.0
d) 10.0

If a ball travels 30m, and is moving at 15 m/s, how many seconds did it take for the ball to travel 30 m?
a) .5 s
b) 1 s
c) 1.5 s
d) 2 s

At what point is potential energy greatest on a roller coaster?
a) at the bottom of a hill
b) halfway up the hill
c) halfway down the hill
d) at the top of the hill

Why does a train need to be at top speed to go up a hill?
a) the train's kinetic energy help is to go up
b) the trains potential energy helps it to go up
c) the train needs momentum to make it to the top
d) all the above

Liquid A has a mass of 11.8g and volume of 15.5ml, Liquid B has a mass of 17.3g and a volume of 29.8ml, Liquid C has a mass of 15.7g and a volume of 19.4ml and Liquid D has a mas of 21.4g and a volume of 27.4ml. Which liquid has the largest density?
a) Liquid A
b) Liquid B
c) Liquid C
d) Liquid D

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