Answer:
Wb = 820.929N mb = 83.68 kg
Explanation:
The given values are:
Fa = 522N Da = 8.98m
Wp = 115N Dp = 8.98/2 = 4.49m
Wb = ? Db = 8.98 - 4.11 = 4.87m
Wc = 3.42*9.81 = 33.55N Dc = 8.98 - 4.11+0.295 = 5.165m
Net torque on the plank will be:
Wp*Dp + Wb*Db + Wc*Dc - Fa*Da = 0
Solving for Wb:
The weight of worker B is 820.929N
Dividing by gravity we get the mass of worker B: 83.68kg
Answer:
heat required in pan B is more than pan A
Explanation:
Heat required to raise the temperature of the substance is given by the formula
now we know that both pan contains same volume of water while the mass of pan is different
So here heat required to raise the temperature of water in Pan A is given as
Now similarly for other pan we have
So here by comparing the two equations we can say that heat required in pan B is more than pan A
Answer:
The elastic potential energy is zero.
The net force acting on the spring is zero.
Explanation:
The equilibrium position of a spring is the position that the spring has when its neither compressed nor stretched - it is also called natural length of the spring.
Let's now analyze the different statements:
The spring constant is zero. --> false. The spring constant is never zero.
The elastic potential energy is at a maximum --> false. The elastic potential energy of a spring is given by
where k is the spring constant and x the displacement. Therefore, the elastic potential energy is maximum when x, the displacement, is maximum.
The elastic potential energy is zero. --> true. As we saw from the equation above, the elastic potential energy is zero when the displacement is zero (at the equilibrium position).
The displacement of the spring is at a maxi num --> false, for what we said above
The net force acting on the spring is zero. --> true, as the spring is neither compressed nor stretched
Answer:
Explanation:
The situation of the system Ryan - merry-go-round is modelled after the Principle of the Angular Momentum Conservation:
The initial speed of Ryan is: