A 2 N apple is hanging from a branch. What is the action force? A. the net force B. the normal force C. a 2 N upward force D. a
2 answers:
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Answer:
4.44 kN in the opposite direction of acceleration.
Explanation:
Given that, the initial speed of the car is,
And the mass of the car is,
The total distance covered by the car before stop,
And the final speed of the car is,
Now initial kinetic energy is,
Substitute the value of u and m in the above equation, we get
Now final kinetic energy is,
Substitute the value of v and m in the above equation, we get
Now applying work energy theorem.
Work done= change in kinetic energy
Therefore,
Here, the force is negative because the force and acceleration in the opposite direction.
Answer :
New force becomes, F' = 1.83 N
Explanation:
Let two point charges exert a force of 7.35 N force on each other. The electric force between two charges is given by :
are charges
r is the distance between charges if the distance between them is increased by a factor of 2, r' = 2r
New force is given by :
F' = 1.83 N
So, the new force between charges will be 1.83 N. Therefore, this is the required solution.