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Mkey [24]
2 years ago
8

A body of mass 80kg moving with a velocity of 6m/s hits a stationary body

Physics
1 answer:
Sauron [17]2 years ago
8 0

Answer:

4 m/s

Explanation:

Conservation of momentum ,  mv

Before collision  80 kg * 6 m/s  = 480  kg-m/s  

   after the collision,

         the momentum is the same but the mass is 80+40 kg =120 kg

 mv = 480

120 * v = 480

v = 4 m/s

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Sunny_sXe [5.5K]

Answer:

Option D

MA=5

Explanation:

Mechanical advantage is the  the ratio of the output force to the  input force hence

MA=\frac {Effort arm length}{Load arm length}

Substituting 15 inches for the effort arm length and 3 inches for the load arm length then we obtain the mechanical advantage as

MA=\frac {15}{3}=5

4 0
3 years ago
Which of the following scenarios would create the most friction between the two surfaces?
Tcecarenko [31]

The Answer to this question would Be A

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Two wheels having the same radius and mass rotate at the same angular velocity. One wheel is made with spokes so nearly all the
Mazyrski [523]

Answer:

C. The wheel with spokes has about twice the KE.

Explanation:

Given that

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Now by comparing kinetic energy

\dfrac{KE_1}{KE_2}=\dfrac{I_1}{I_2}

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\dfrac{KE_1}{KE_2}=2

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Therefore answer is C.

5 0
3 years ago
What change will most likely increase the strength of a magnetic field produced by an electromagnet? a. Reduce the number of tur
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Answer:

Option D

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-Use success strategies that are ways in which you can achieve your goal of creating a good habit to exercise.

According to this, the option that would not help Bob develop a good habit is if he works out for only one week as doing something everyday is what would help you to create the habit.

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