When the two forces of gravity and air resistance become the same, the object no longer speeds up, and it doesn't slow down either. This is called terminal velocity
So the answer is b
Answer:
81.81 kg
Explanation:
= Mass of person = 78.4 kg
= Mass of canister
= Initial velocity of person = 0
= Initial velocity of canister = 3.5 m/s
= Final velocity of person = 2.4 m/s
= Final velocity of canister = 1.2 m/s
The momentum balance in the system is given by
Mass of the canister is 81.81 kg.
Typically a scaffolding has two ropes to support it. One
on the left most side while the other one is on the right most side. Based on
equilibrium rule, the summation of forces must be 0. The downward force is the
weight of person and scaffolding, while the upward force are the tensions on
the two ropes, hence:
Weight person + Weight scaffolding = 2 * Tension
500 N + Weight scaffolding = 2 * 400 N
Weight scaffolding = 300 N
Answer:
78.156 m/s
Explanation:
(assuming no upthrust from the air on the arrow)
Ball has a motion only under ther gravity
Apply motion equation upwards
(g = 10m/s²)
V² = U² + 2as
= 82.5² + 2*(-10)*(36.3-1.41.)
= 6108.45
V = 78.156 m/s
The answer is Marie Skłodowska Curie (AKA Marie Curie). She <span>lived her life awash in ionizing radiation. She would be carrying bottles of the radium and polonium in the pocket of her coat and put them in her desk drawer.
So even after a century, her papers are still radioactive. Since the</span><span> most general isotope of radium, which is radium-226, has a half life of 1,601 years.</span>