Answer:
time taken will be 6.24sec.
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The height of the building where a penny falls and hits the ground going 30 m/s is 45.9 m.
The height of the building can be calculated with the following equation:
Where:
: is the final speed = 30 m/s
: is the initial velocity = 0 (it falls from rest)
g: is the acceleration due to gravity = 9.81 m/s²
h: is the height =?
Hence, the <u>height </u>is:
Therefore, the height of the building is 45.9 m.
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Answer:
The gravitational force on the moon is less than on Earth, because the strength of gravity is determined by an objects' mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere
Explanation:
Why might astronauts choose to “lope” or hop rather than walking or running on the moon? Astronauts can “lope” in the moon's low gravity levels, even though this gait pattern is very difficult to use on Earth.
The mass of an object is the amount of substance it is made up of or it contains but the weight of that object is the force exerted by that object as a result of gravity.The S.I. unit for mass is kilograms but weight is measured in Newtons. Mass is constant or does not change but weight depends on the gravity of the place.
Answer:
Explanation:
Frictional force acting on the box = mg cos 25 x μ where μ is coefficient of friction
= 2.4 x 9.8 x cos 25 x .51 = 10.87 N
Weight of the box acting along the incline = mg sin 25 = 9.94 N
Net force = 10.87 - 9.94 = .93 N . It will create a deceleration of .93 / 2.4
= .3875 m /s² in the box.
v² = u² - 2 a s
v = 0 , a = .3875 , s = 5.4 m
= = u² - 2 x .3875 x 5.4
u = 2.045 m /s