Answer:
B
Explanation:
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A uniform metal rod with of length 80cm and a mass of 3.2kg is supported horizontally by two vertical spring balances C and D. Balance C is 20cm from one end while D is 30cm from the other end would show the reading of 1.06 Kg and 2.13 kg respectively
<h3>What is gravity?</h3>
It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another, The gravity varies according to the mass and size of the body for example the force of gravity on the moon is the 1/6th times of the force of gravity on the earth.
As given in the problem, A uniform metal rod of the length of 80cm and mass of 3.2kg is supported horizontally by two vertical springs balance C and D. Balance C is 20cm from one end while D is 30cm from the other end
The weight of the rod acting downward is from the center of the rod at 40 cm
Let us suppose the reading on the spring balance C and D are P and Q respectively
By using the equilibrium for the vertical force
Fv=0
P + C = 3.2
By using the equilibrium for the moment around the left corner
20×P+ 50×Q= 40 ×3.2
By solving for both P and Q from the above two equations we would get
P =1.06 and Q = 2.13
Thus, the reading on the spring balance C and D would be 1.06 Kg and 2.13 kg respectively
Learn more about gravity from here
brainly.com/question/4014727
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Answer:
Well. the law says "an object in motion stays in motion" So seatbelts could be one. they stop us humans from continuing to move when the car stops.
Answer is D - from the equation of electric field for point charge
The impact force makes sense because the impulse experienced by the body cause a great change in momentum of the body.
<h3 /><h3>What is impulse?</h3>
This is the force that acts on a body over a given period of time. The impulse experienced by a body is determined as the product of force and time of action.
J = Ft
The change in momentum of a body is equal to the impulse experienced by the body.
ΔP = Ft
Thus, the impact force makes sense because the impulse experienced by the body cause a great change in momentum of the body.
Learn more about impulse here: brainly.com/question/25700778
