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krek1111 [17]
2 years ago
15

A trolley is moving at constant speed in a friction compensated track. Some plasticine is dropped on the trolley and sticks on i

t. State with a reason what is observed about the motion of the trolley.​
Physics
1 answer:
Maurinko [17]2 years ago
5 0

Answer:

Since the momentum of the body remains constant ( conserved) the trolley slows down (its velocity reduces) since its mass increases.

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3 years ago
10. The electron dot diagram for the element Ne would have ​
zmey [24]

Answer:

2,8

Explanation:

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Which of the following determines whether light shining on a metal surface will eject electrons from that surface?
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From that list, only the frequency makes the difference.

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3 years ago
When is a secondary source more helpful than a primary source?
UNO [17]

Answer:

I think the answer is C.

Explanation:

A primary source is a first hand account of an event while a secondary source is a retelling or second hand account meaning as many details will be prevalent.

8 0
2 years ago
A hockey stick of mass ms and length L is at rest on the ice (which is assumed to be frictionless). A puck with mass mp hits the
krek1111 [17]

Answer:

L = mp*v₀*(ms*D) / (ms + mp)

Explanation:

Given info

ms = mass of the hockey stick

uis = 0 (initial speed of the hockey stick before the collision)

xis = D (initial position of center of mass of the hockey stick before the collision)

mp = mass of the puck

uip = v₀ (initial speed of the puck before the collision)

xip = 0 (initial position of center of mass of the puck before the collision)

If we apply

Ycm = (ms*xis + mp*xip) / (ms + mp)

⇒  Ycm = (ms*D + mp*0) / (ms + mp)

⇒  Ycm = (ms*D) / (ms + mp)

Now, we can apply the equation

L = m*v*R

where m = mp

v = v₀

R = Ycm

then we have

L = mp*v₀*(ms*D) / (ms + mp)

5 0
3 years ago
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