Answer:
The answer is C 1.8V and 0.38A
Answer:
0.181
Explanation:
We can convert the 0.5 rps into standard angular velocity unit rad/s knowing that each revolution is 2π:
ω = 0.5 rps = 0.5*2π = 3.14 rad/s
From here we can calculate the centripetal acceleration
Using Newton 2nd law we can calculate the centripetal force that pressing on the rider, as well as the reactive normal force:
Also the friction force and friction acceleration
For the rider to not slide down, friction acceleration must win over gravitational acceleration g = 9.81 m/s2:
Answer:
Mercury and Venus do not have moons. This is because any moon orbiting around them would be in an unstable orbit and would most likely be swallowed by the mammoth gravitational pull of our solar system’s mighty Sun. Whenever we look up at the night sky, we see a greyish-white object hung brightly among thousands of other visible stars.
Answer:
v₁ = u₁/2√3 ≈ 0.866u₁
v₂ = u₁/2 = 0.5u₁
θ = 60°
Explanation:
let u₁ be the initial velocity of the first ball
let v₁ be the final velocity of the first ball
let v₂ be the final velocity of the second ball
For elastic collisions, the angle between the departing masses is 90°
assume the first ball initially moves along the x axis in the positive direction
conservation of momentum
In the y direction, initial momentum is zero
After the collision
mv₁sin30 = mv₂sin60
½v₁ = ½√(3)v₂
v₁ = √(3)v₂
in the x direction,
mu₁ = mv₁cos30 + mv₂cos-60
u₁ = v₁cos30 + v₂cos60
u₁ = (√(3)v₂)½√(3) + ½v₂
u₁ = 2v₂
v₂ = u₁/2
v₁ = √(3)v₂ = √(3)(u₁/2)
