a)5m/s b)5
the 5 is because you add the seconds to get 8 seconds and then do the same with the distance to get 40. 40/8 = 5. speed = 5
Velocity = displacement/change in time
V = 40/8
I just realized how unorganised my math looks but I hope this is helpfull
Answer:
Explanation:
It doesn't mean it equal to each other. lets say x is directly proportional to y. Here, if something happens to x then, y will do the same thing. for example, if x increases, then y also increases. similarly, if x decreases, then y also decreases. therefore, x is something or lets say it is a major factor that decides the fate of y.
Angular momentum is the measure of the amount of rotation of the body. It is the product of the moment of inertia and the angular velocity. The moment of inertia has the equation I=mr^2, where m is the mass and r is the radius of the circle. In this case, the radius is 0.6 m. Then, I = 2kg * (0.6)^2 = 0.72 kg-m2/s2.
The angular velocity on the other hand is the product of linear velocity and the radius. The equation is ω = rv, where v is the linear velocity. Therefore, ω = 0.6*1.1 = 0.66 rad/s
Therefore, the angular momentum is
= 0.72 kg-m2/s2*0.66 rad/s
= 0.48 kg-m^2/s
Answer:
The resistance R stretched of the wire if it is stretched to twice its original length is [Δ(2L) / A ]* 2
Explanation:
Original Resistance R = ΔL / A
Given length is doubled
New length L' = 2L
New Volume is constant, resistivity and density of material is also assumed to be constant
AL = A'L'
AL = A'(2L)
A' = AL / 2L
A' = A / 2
∴ new Resistance R' = ΔL' / A'
= Δ(2L) / A/2
= [Δ(2L) / A ]* 2
