Answer:
Explanation:
R² = F₁² + F₂² + 2F₁F₂ Cosθ , R is resultant force , θ is angle between them
780² = 390² + 550² + 2 x 390 x 550 Cosθ
608400 = 152100 + 302500 + 429000 Cosθ
Cosθ = .3585
θ = 69 degree.
Answer:
Action and reaction forces don't cancel each other out because they act on separate objects. ... Action and reaction forces are always equal in magnitude, so it's not possible to exert more force on an object than it can exert back.
Explanation:
Compressional waves are mechanical.mechanical waves require a medium to travel. in a vacuum, there is no matter, so the waves cannot travel
Answer:
B. A object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force.
A person runs up 40 stairs and then come down 10 steps
So total stairs upwards is given as
now here we will have total height reached
Now total energy used or mechanical work done is
Now the mechanical power is given as
