Answer;
V = 14.7 m/s
Explanation and solution;
Vx = V cos theta
Vx = 16m/s × cos 28.08
Vx = 14.1 m/s
Vy = Vsin theta
Vy = 7.51m/s
t = d/Vx
t = 16.8m/ 14.1
t= 1.191 s
Now, find Vy at t= 1.191
Vy = Vy - gt
Vy = 7.51 - 9.81*1.191
Vy = - 4.18 m/s
V = sqrt (Vy^2 +Vx^2)
V= sqrt (4.18^2 + 14.1^2)
V= 14.7m/s
Answer:
The mass of 20 cm of the metal is 360 grams.
Explanation:
Relative density or specific gravity is the ratio of the density of a substance to the density of a standard; usually water for a liquid or solid, and air for a gas. It has no units.
Given, relative density of a metal is 19 and volume of the metal is 20 cm.
We know that, Mass= Volume X Density. So, mass is 19 X 20= 380 grams.
So, weight in water = true weight- upthrust
Desired answer is 380- 20 X 1= 360 grams.
Your answer would be i think repetition
Answer:
W = 270.9 J
Explanation:
given,
F(x) = (12.9 N/m²) x²
work = Force x displacement
dW = F .dx
the push-rod moves from x₁= 1 m to x₂ = 4 m
integrating the above
`
W = 270.9 J
work done by the motor is W = 270.9 J