Why did the acorn fall to earth instead of rising up to the moon?
2 answers:
Answer:
Gravitational force exists between any two bodies having mass. It is proportional to the mass of two bodies and inversely proportional to the square of distance between them.
Thus, with increase in distance, the gravitational force decreases.
Acorn falls to Earth because of the following two reasons:
1. Mass of Earth > Mass of Moon
2. Acorn is closer to the Earth
Thus, the gravitation force of attraction is greater towards the Earth.
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Answer:
The distance by the ball clear the crossbar is 1.15 m
Explanation:
Given that,
Distance = 44 m
Speed = 24 m/s
Angle = 31°
Height = 3.05 m
We need to calculate the horizontal velocity
Using formula of horizontal velocity
Put the value into the formula
We need to calculate the vertical velocity
Using formula of vertical velocity
Put the value into the formula
We need to calculate the time
Using formula of time
Put the value into the formula
We need to calculate the vertical height
Using equation of motion
Put the value into the formula
We need to calculate the distance by the ball clear the crossbar
Using formula for vertical distance
Put the value of h
Hence, The distance by the ball clear the crossbar is 1.15 m