Every object in the universe attracts every other object
Answer:
When a bridge is used for long time It lises its elastic .Therefore ,the amount of strain in the bridge for a given stress will become large and ultimately, the bridge may collapse .This is why the bridge are declared unsafe after a long time.
Explanation:
Explanation:
The box has no acceleration in the perpendicular direction, so the net force in that direction is 0.
Sum of forces in the parallel direction:
∑F = f − F∥ − mg∥
∑F = f − F cos φ − mg sin θ
Answer:
J of energy is available through fusion .
Explanation:
let us consider weight of the human body on an average be 70 kg .
since 0.8% of mass is used to convert into energy =
since according to einstein mass energy equation