Explanation:
<h2>potential energy formula is 1/2 mv2(this 2 is square).</h2>
m means mass and v means velocity.
now, you can calculate
Answer:
The answer is
A. Switch
Explanation:
A switch is a device for making and breaking current in an electric circuit, it is mostly made of a non conducting material to prevent the user from being electrocuted, switches comes in range of types depending on the area of applications.
Answer:
0.667 m/s
Explanation:
Given that,
Mass of a rubber bullet, m₁ = 20 g = 0.02 kg
Initial speed of rubber bullet, u₁ = 60 m/s
Mass of the wood block, m₂ = 3 kg
Initial speed of the wooden block, u₂ = 0
A rubber bullet hits the stationary wood block. The rubber bullet ricochets off the wood block with a velocity of 40.0 m/s in the opposite direction.
Final speed of rubber bullet, v₁ = -40 m/s
Using the conservation of momentum. It will remains conserved. Let v₂ is the velocity of the wood block.
So, the velocity of the wood block is 0.667 m/s.
The energy change taking place in the clock is the electrical energy to the mechanical energy to the light energy.
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<u>Explanation:</u>
- The alarm clock will work in the battery in the form of electrical energy. Then due to the current passed the electric motor rotates the blade.
- Then the energy is converted into mechanical energy.
- Then the mechanical energy generates the light and When it is plugged into a wall outlet, the alarm clock lights up with a time display.
- This is the energy transformation taking place in the alarm clock.
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Answer: 479. 425 N
Explanation: the calculation of a body in an elevator obeys Newton law. When it is accelerating upward, the scale reading is greater than the true weight of the person.
It is given by N= m(g+a)
When it is accelerating downward, the scale reading is less than the true weight.
It so given by N = m(g-a)
The answer to the above questions is in the attached photo