Question

Ethan, whose mass is 80 kg, stands at one end of a very long, stationary wheeled cart that has a mass of 380 kg. He then starts sprinting toward the other end of the cart. He soon reaches his top speed of 8.0 m/s, measured relative to the cart.

What is the cart’s speed when Ethan reaches top speed?

Express your answer with the appropriate units.

Answer #1

Use the concept of relative velocity and conservation of momentum principle to find the required speed of cart as shown below

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Ethan, whose mass is 80 kg, stands at one end of a very long,
stationary wheeled cart that has a mass of 500 kg. He then starts
sprinting toward the other end of the cart. He soon reaches his top
speed of 8.0 m/s, measured relative to the cart.
What is the cart’s speed when Ethan reaches top speed?
Express your answer with the appropriate units.

Ethan, whose mass is 80
kgkg,
stands at one end of a very long, stationary wheeled cart that has
a mass of 260
kgkg.
He then starts sprinting toward the other end of the cart. He soon
reaches his top speed of 8.0
m/sm/s,
measured relative to the cart.
What is
the cart’s speed when Ethan reaches top speed?
A
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A student of mass m1 = 73 kg stands on a
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m/s
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ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
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5:
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??...

answer all questions
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill is 279 meters...

8 through 10 done please!!
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill is...

just do questions 5 through 10
3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
If the hill...

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