Answer:
Option (D) is correct.
Explanation:
The balloon lands horizontally at a distance of 420 m from a point where it as released.
Velocity of air balloon along +X axis =10 m/s
velocity of ball=4 m/s along + X axis
the velocity of balloon gets added to the velocity of ball. So the resultant velocity of the balloon=10+4 = 14 m/s
time taken= 30 s
The distance traveled is given by d= v t
d= 14 (30)
d= 420 m
Thus the balloon lands horizontally at a distance of 420 m from a point where it as released.
<h2>
Time needed is 2545.45 seconds.</h2>
Explanation:
We know equation for power

Here we need to find time when for a 22 kW steam engine to do 5.6 × 10⁷ J of work.
So
Work = 5.6 × 10⁷ J
Power = 22 kW = 22 x 10³ W
Substituting

Time needed is 2545.45 seconds.
Answer: A 60 g golf ball is dropped from a level of 2 m high. It rebounds to 1.5 m. Energy loss will be 0.29J
Explanation: To find the correct answer, we have to know more about the Gravitational potential energy.
<h3>What is gravitational potential energy?</h3>
- The energy possessed by a body by virtue of its position in gravitational field of earth is called gravitational potential energy.
- The gravitational potential energy of a body at a height h with respect to the height h will be,

- Expression for gravitational potential energy loss will be,

<h3>How to solve the problem?</h3>
- The total energy before the ball dropped will be,

- The total energy after when the ball rebounds to 1.5m will be,

- The total energy loss will be,

Thus, we can conclude that, the energy loss will be,0.294J.
Learn more about the gravitational potential energy here:
brainly.com/question/28044692
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Answer:
increase speed, decrease speed, and change direction
Explanation:
Answer:
a)The gravitational force would be twice as much as it is now
Explanation:
If the earth had twice its mass as it is now, the gravitational force between the sun and the earth would be twice as much as it is now.
According to Newton's law of universal gravitation "the gravitational force of attraction between bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them".
F
= 
G is the universal gravitation constant
m is the mass
r is the distance
let mass of sun = s
mass of earth = e
new mass of sun = s
new mass of sun = 2e
input variables;
F =
------ i
F =
------- ii
From the second equation;
2F = 
2F = F
Therefore, the force will double.