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larisa86 [58]
3 years ago
13

A 5.44 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant horizontal force

of 7.4 N. Find the block's speed after it has moved 4.9 m.
Physics
1 answer:
Margaret [11]3 years ago
8 0

Answer:

v = 3.65 m/s

Explanation:

It is given that,

Mass of the block, m = 5.44 kg

Horizontal force acting on the block, F = 7.4 N

We need to find the speed of the block after it has moved 4.9 meters. It can be calculated using the work energy theorem as:

F.d=\dfrac{1}{2}mv^2

v=\sqrt{\dfrac{2Fd}{m}}

v=\sqrt{\dfrac{2\times 7.4\times 4.9}{5.44}}

v = 3.65 m/s

So, the speed of the block is 3.65 m/s. Hence, this is the required solution.

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The average speed of an object which moves 100 m in 5 seconds is?
CaHeK987 [17]

Answer:

A car

Explanation:

A car can travel 100 m in 5 seconds

Hope this helps!

3 0
3 years ago
Imagine two billiard balls on a pool table. Ball A has a mass of 7 kilograms and ball B has a mass of 2 kilograms. The initial v
olga_2 [115]
A) the final velocity = 66/9 m/s.
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7 0
4 years ago
A boy is pulling a cart by a force of 100N. The frictional force experienced by the cart is 20N. The force causing the motion of
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Answer:

3 is right i guss look : 100N-20N=80N

4 0
3 years ago
Given the resistivities below, which matedal is best described as an insulator?
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Answer:

C. 3.2 x 10^8 Ω•m

Explanation:

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6 0
4 years ago
When passing through a lock, which light means âapproach the lock under full control?â?
vekshin1
The locks referred to here are the elevators that are used to transport boats safely from one water level to another in dams. These two varying water depths allow river traffic to operate  The attached picture shows how boats enter locks in dam sites.

To regulate traffic, there are traffic lights that signal boatmen to adjust their speed when approaching the lock. The red light means to stop and to steer clear away from the lock to allows the boats inside to exit. The green light signals to enter the lock. Lastly, the amber light means approach the lock at a safe speed and under full control.

6 0
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