Explanation:
Given that,
Mass of the car, m₁ = 1250 kg
Initial speed of the car, u₁ = 7.39 m/s
Mass of the truck, m₂ = 5380 kg
It is stationary, u₂ = 0
Final speed of the truck, v₂ = 2.3 m/s
Let v₁ is the final velocity of the car. Using the conservation of momentum as :
So, the final velocity of the car is 2.5 m/s but in opposite direction. Hence, this is the required solution.
With what you do need help?????
Answer:
The answer is below
Explanation:
Because of the resistance of transmission lines, high current along the line leads to large voltage drop. This voltage drop causes low efficiency because the voltage at the receiving end is far less than that at the sending end.
Therefore there is need to transmit at a higher voltage (smaller current) than that required by distribution because of efficiency.
Hence, For safety and efficiency, the voltage must be large in the transmission lines and small in the distribution lines.
Answer: The correct answer is "the same magnitude of force, 60 N should be applied".
Explanation:
Balanced forces: These forces are balanced when the forces are acting equal in magnitude but opposite in direction. The balanced forces will not cause any change in the speed of the object.
Unbalanced forces: These forces are unbalanced when the forces acting on the object are not equal in magnitude. It will cause the change in the speed of the body.
In the given problem, Jennifer stands on one side of a filing cabinet and pushes with a force of 60 N. If Nathan wants to help Jennifer demonstrate balanced forces, then he should apply the same magnitude of force of 60 N.