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Over [174]
2 years ago
6

Carts A and B have equal masses and travel equal distances D on side-by-side straight frictionless tracks while a constant force

F acts on A and a constant force 2F acts on B. Both carts start from rest. The velocities A and B of the bodies at the end of distance D are related by
Physics
1 answer:
GarryVolchara [31]2 years ago
5 0

Answer:

The velocity of cart B is \sqrt{2} the velocity of cart A

Solution:

As per the question:

Let the masses of both the carts A and B be 'm' kg

Distance traveled by both the carts be 'D' m

Force acting on A be 'F' N

Force acting on B be '2F' N

Now,

The relation between the velocities of A and B can be derived as :

Acceleration of cart A, a_{A} = \frac{F}{m}

Acceleration of the cart B, a_{B} = \frac{2F}{m} = 2[tex][a_{A}]

Now, using the third eqn of motion for both the carts A and B:

For cart A:

v_{A}^{2} = u_{A}^{2} + 2a_{A}D

v_{A} = \sqrt{2aD}

v_{B}^{2} = u_{B}^{2} + 2a_{B}D

v_{B}^{2} = 2(2a_{A})}D

where

u_{A} = u_{B} 0 = initial velocity of cart A and cart B respectively

v_{A} = final velocity of cart A

v_{B} = final velocity of cart B

v_{B} = \sqrt{4a_{A}}D

Now, dividing the velocities of the cart A and B:

\frac{v_{A}}{v_{B}} = \sqrt{\frac{1}{2}}

v_{B} = \sqrt{2}v_{A}

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A child is riding a merry-go-round that is turning at 7.18 rpm. If the child is standing 4.65 m from the center of the merry-go-
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Answer:

B) 3.50 m/s

Explanation:

The linear velocity in a circular motion is defined as:

v=\omega r(1)

The angular frequency (\omega) is defined as 2π times the frequency and r is the radius, that is, the distance from the center of the circular motion.

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