Answer:
(a) = 0 N
(b) = 2.4 N
Explanation:
given
box of banana weight = 40.0 N
coefficient of static friction μ = 0.40
coefficient of kinetic friction = 0.20
a). when no horizontal force is applied .
according to Newton 's third law of motion If there is no force applied to the box,so the frictional force exerted is 0 N
b) magnitude of friction force
box and the box is initially at rest
friction force =.Static friction coefficient × weight of the box
friction force = 0.40 × 6
friction force = 2.4 N
The wave height is equal to twice the amplitude of the wave.
The wave height of a wave of given wave with amplitude, period and wavelength is equal to twice the amplitude of the wave.
The amplitude of a wave is the maximum displacement of the wave, starting from the zero position of the wave. The wave height measures twice the maximum displacement of the wave.
Thus, we can conclude that the wave height is equal to twice the amplitude of the wave.
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Answer:
option B
Explanation:
Radius of new planet,R' = 2R
Mass of the earth, M' = 2 M
R and M is the Radius and Mass of the earth.
Weight of the person on earth = 500 N
Weight of the person in the new planet = ?
We know acceleration due to gravity is calculated by using formula
now, acceleration due to gravity on the new planet
here acceleration due to gravity is half in new planet, so weight will also be half on the new planet.
Weight on the new plane is equal to 
= 250 N
correct answer is option B
Answer:As a noun relative means a person who is connected with others by blood.
Answer:
0.63 s
Explanation:
We have,
- Height, h = 2.0 m
- Initial velocity, u = 0 m/s
- Acceleration due to gravity, g = 10 m/s²
We have to find the time taken.
⠀⠀⠀⠀⇒ h = ut + ½gt²
⠀⠀⠀⠀⇒ h = ½gt²
⠀⠀⠀⠀⇒ 2 = ½ × 10 × t²
⠀⠀⠀⠀⇒ 2 = 5 × t²
⠀⠀⠀⠀⇒ 2/5 = t²
⠀⠀⠀⠀⇒ √(2/5) = t
⠀⠀⠀⠀⇒ <u>0.63 s = t</u>
Therefore, time taken is 0.63 seconds.
