Answer:
When balloon moves in the downward direction two forces acts on it.
i) Force exerted by air in the upward direction
ii) Weight
According to newton’s second law of motion:
Sum of forces = Ma
W – F = Ma
Mg – F = Ma …….. (i)
when some of the mass m is dropped and balloon is moving in upward direction with acceleration a/2 then,
F – W = (M-m)a/2
F – (M-m)g = (M-m)a/2
F – Mg + mg = Ma/2 – ma/2 ….. (ii)
Adding equation (i) and (ii)
mg = M(3a/2) – ma/2
m(g + a/2) = M(3a/2)
m = M(3a/2)/(g + a/2)
It is important that a football defender should have a lot of mass because of Defenders are aggressive .
- They aren't afraid to make strong tackles and use their body.
- They attack balls with their heads and get in front of shots.
- Play so aggressive that players are scared to receive the ball.
• The role of the first defender is further broken down into four steps :- Approach , Delay , Control and Tackle ..
<h3>Hope this helps you :) ..</h3>
When the student uses a straw to blow a stream of air between the papers, the <span>two pieces of paper come together because the pressure between the two was lowered. This follows the Bernoulli’s Principle. Hope this answers the question. Have a nice day.</span>
Answer:
1.352 × 1018 newtons
Explanation:
The force of gravity between the two planets is given by:
where
is the gravitational constant
is the mass of the Earth
is the mass of Jupiter
is the distance between the two planets
Substituting all the numbers into the equation, we find:
