Answer
given,
mass of an object = 5 Kg
mass of the other object = 5.98 x 10²⁴ Kg
radius of earth = 6371 Km = 6.371 x 10⁶ m
comparison between gravitational force between two object and weight of the object.
gravitational force between two objects
![F = \dfrac{Gm_1m_2}{r^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7BGm_1m_2%7D%7Br%5E2%7D)
![F = \dfrac{6.67 \times 10^{-11}\times 5 \times 5.98 \times 10^{24}}{(6.371 \times 10^6)^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7B6.67%20%5Ctimes%2010%5E%7B-11%7D%5Ctimes%205%20%5Ctimes%205.98%20%5Ctimes%2010%5E%7B24%7D%7D%7B%286.371%20%5Ctimes%2010%5E6%29%5E2%7D)
F = 49.134 N
weight of the object on the earth surface
F = m g
F = 5 x 9.81
F = 49.05 N
From the above two calculation we can conclude that gravitational force is approximately equal to weight of the body.
Answer: 0.003 N
Explanation: Force (F) = Mass (m) * Acceleration (a)
Where acceleration is the rate of change of velocity (v/t)
v = 50 cm/s
t = 2 s
M = 12 g = 0.012 kg
a = v/t = 50/2 = 25 cm/s^2 = 0.25m/s^2
Hence F = m * a = 0.012 * 0.25 = 0.003 N
Answer:
B
Explanation:
F = ma , a = F/m
a1 = F/10 and a2 = F/4
Since Force is constant, a2 will we greater than a1
On Earth, gravity adds 9.8 m/s to the speed of a falling object every second.
If the coin and the balcony are both on Earth, and if the falling coin
is not influenced by air resistance, then after 2.7 seconds, its speed
has increased by
(2.7 x 9.8 m/s) = 26.46 m/s .
Its final velocity is 26.46 m/s downward.