Answer:
Explanation:
The law of gravitation
Universal gravitational constant [S.I. units]
Mass of Earth [S.I. units]
Mass of a man in a spacecraft [S.I. units]
Earth radius [km]
Distance between man and the earth's surface
ESULT
Answer:440.03 N
Explanation:
Given
horizontal component of acceleration
vertical component of acceleration
mass of ball =0.37 kg
Force in horizontal direction
Force in vertical direction
Therefore net force is
|F|=440.03 N
Answer:
Explanation:
In an electric field E force on charge q
F = Eq , acceleration a = Eq / m
a = 664 x 1.6 x 10⁻¹⁹ / 1.67 x 10⁻²⁷
= 636.16 x 10⁸ m /s²
b )
initial velocity u = 0
final velocity v = 1.46 x 10⁶ m/s
v = u + at
1.46 x 10⁶ = 0 + 636.16 x 10⁸ x t
t = 2.29 x 10⁻⁵ s
c )
s = ut + 1/2 a t²
= 0 + .5 x 636.16 x 10⁸ x ( 2.29 x 10⁻⁵ )²
= 1668 x 10⁻²
= 16.68 m
d )
Kinetic energy = 1/2 m v²
= .5 x 1.67 x 10⁻²⁷ x ( 1.46 x 10⁶ )²
= 1.78 x 10⁻¹⁵ J .
Answer:
A black hole is a place in space where gravity pulls so much that even light can not get out
Answer:
h1/h2 =
Explanation:
Using two rolls of tissue paper : One roll dropped normally while the other drops as some holds onto a sheet of the toilet paper ( I.e. the tissue paper drops rotating about its axis )
<u>Determine the ratio of heights h1/h2</u>
mass of tissues = same
radius of tissues = same
h1 = height of tissue 1
h2 = height of tissue 2
<em>For the first tissue ( Tissue that dropped manually ) </em>
potential energy = kinetic energy
mgh = 1/2 mv^2
therefore the final velocity ( v^2 ) = 2gH ----- ( 1 )
<em>second tissue ( Tissue that dropped while rotating ) </em>
gh = ( 3 + ) ------ ( 2 )
To determine the ratio of heights we will equate equations 1 and 2
hence :
gh = ( 3 + )
∴ h1/h2 =