Select all that apply. An acorn falls from a tree. Which of the following statements is true? The force of gravity is acting on
the acorn. The force of gravity is the only force acting on the acorn. A frictional drag force is acting on the acorn. The net force on the acorn is less than the force of gravity.
2 answers:
Answer:
The force of gravity is acting on the acorn.
A frictional drag force is acting on the acorn.
The net force on the acorn is less than the force of gravity.
Explanation:
The force of gravity is acting on the acorn is in vertically downwards direction.
A frictional drag force is acting on the acorn is in vertically upwards direction.
The net force on the acorn is given by
Net force = Force of gravity - Frictional drag force
It is always less than the force of gravity.
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Answer:
g = 8.61 m/s²
Explanation:
distance of the International Space Station form earth is 200 Km
mass of the object = 1 Kg
acceleration due to gravity on earth = 9.8 m/s²
mass of earth = 5.972 x 10²⁴ Kg
acceleration due to gravity = ?
r = 6400 + 200 = 6800 Km = 6.8 x 10⁶ n
using formula
g = 8.61 m/s²
Answer:
(a) 0.345 T
(b) 0.389 T
Solution:
As per the question:
Hall emf,
Magnetic Field, B = 0.10 T
Hall emf,
Now,
Drift velocity,
Now, the expression for the electric field is given by:
(1)
And
Thus eqn (1) becomes
where
d = distance
(2)
(a) When
(b) When