A frictionless plane is 10.0 m long and inclined atA sled starts at the bottom with an initial speed of 5.00 m/s up the incline. When it reaches the p

Josalynn

Josalynn

Answered question

2021-02-10

A frictionless plane is 10.0 m long and inclined atA sled starts at the bottom with an initial speed of 5.00 m/s up the incline. When it reaches the point at which it momentarily stops, a second sled is released from the top of this incline with an initial speed v1 both sleds reach the bottom of thein cline at the same moment. 
(a) Determine the distance that the first sled traveled up the incline. 
(b) Determine the initial speed of the second sled.

Answer & Explanation

jlo2niT

jlo2niT

Skilled2021-02-11Added 96 answers

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Jeffrey Jordon

Jeffrey Jordon

Expert2021-10-07Added 2605 answers

a) Initial speed of sled 1 is u1=5.1 m/s

Final speed of sled 2 is vt=0

a=gsinθ

Then apply

V2u2=2aS

V12u12=2gsinθS

Here θ=35 then

0u12=2gsin35×S

Then S=u122gsin35=(5.1)22×9.8×0.5735

=2.314 m

b)Now Sled 1 and Sled 2 both reached the bottom at the same time then

Now S=12gsinθt2

Then t=2Sgsinθ

=2×2.3149.8×0.5735

=0.907 sec

Now Length of incline L=10 m

Then L=u2t+12(gsinθ)t2

L=u2×0.907+2.314

10=u2×0.907+2.314

u2×0.907=102.314

u2×0.907=7.686

u2=8.4749 m/s

xleb123

xleb123

Skilled2023-05-26Added 181 answers

Answer:
(a) The distance traveled by the first sled up the incline is 0 meters.
(b) There is no valid solution for the initial speed of the second sled, v2.
Explanation:
(a) Distance traveled by the first sled:
Let's denote the distance traveled by the first sled up the incline as d1.
The potential energy at the bottom of the incline is converted into kinetic energy at the top, assuming no energy losses due to friction. Therefore, we can equate the potential energy at the bottom to the kinetic energy at the top:
mgh=12mv12
Here, m represents the mass of the sled, g is the acceleration due to gravity, and v1 is the speed of the first sled at the top of the incline.
Since the sled momentarily stops at the point where it reaches, its kinetic energy becomes zero. Therefore, we can write:
mgh=0
From this equation, we find that the height h is zero, which means the sled did not travel up the incline at all. Hence, the distance traveled by the first sled, d1, is 0.
(b) Initial speed of the second sled:
Let's denote the initial speed of the second sled as v2.
Since both sleds reach the bottom of the incline at the same moment, we can equate the time taken by the first sled to the time taken by the second sled:
d1v1=10.0 mv2
Substituting the value of d1 (which we found to be 0) and rearranging the equation, we get:
0v1=10.0 mv2
This equation simplifies to 0=10.0 m.
Since the equation is not possible, there is no valid solution for the initial speed of the second sled, v2.

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