Answer:
Explanation:
Question 1:
Mass=1kg
Acceleration due to gravity=9.8m/s^2
Height=10m
on the before falling it has potential energy
Potential energy=mass x acceleration due to gravity x height
Potential energy=1 x 9.8 x 10
Potential energy=98 joules
Question 2:
Potential energy=kinetic energy base base on energy transformation
Kinetic energy=(mass x (velocity)^2)➗2
98=(1 x(velocity))^2 ➗ 2
Cross multiplying
98 x 2=(velocity)^2
196=(velocity)^2
Velocity=√(196)
Velocity=14
Velocity=14m/s
Answer:
The force of gravitational attraction is 8.454 x 10⁻⁸ N.
Explanation:
Given;
mass of the boy, m₁ = 78 kg
mass of the girl, m₂ = 65 kg
distance between the boy and the girl, r = 2 meters
The force of gravitational attraction is given as;
where;
G is gravitational constant = 6.67 x 10⁻¹¹ Nm²/kg²
r is the distance between two masses, m₁ and m₂
Therefore, the force of gravitational attraction is 8.454 x 10⁻⁸ N.
Answer:
<em>An object is said to be rated </em><em>1 Watt </em><em>when it performs a work worth </em><em>1 Joule </em><em>in </em><em>1 second.</em>
Explanation:
<em>We know that power is rate of doing work or Work done in a given period of time.</em>
<em>Power is simply given by the formula:</em>
<em>Power=(Work)/(Time)</em>
<em>The SI unit of Power, Work and Time are Watts, Joules and Seconds respectively.</em>
<em>Hence, 1 Watt=1 Joule/ 1 Second</em>
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Time period is T if increasing the amplitude to 2A
What is Time period?
The length of time during which an activity occurs or a condition remains.
The period of a spring-mass system is proportional to the square root of the mass and inversely proportional to the square root of the spring constant.
Formula of Time period, T:
Where,
k is the spring constant
mass of system = M
Amplitude = A
Time period = T
Here,
The amplitude is doubled = 2A
Since from the formula we can say that, The Time period is not dependent on amplitude.
Increasing the amplitude implies increase in the restoring force. An increase in the restoring force means the mass is now accelerated to cover more distance in the same period.
So the restoring force cancels the effect of the increase in amplitude.
Hence,
Time period is T if increasing the amplitude to 2A
Learn more about time period here:
<u>brainly.com/question/14051226</u>
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Answer: 384,300,000 m
Explanation:
Speed is mathematically expressed as:
Where:
is the speed of light
is the distance traveled
since is the time it takes to the pulse to go the moon and return.
Finding :
Finally: