Answer:
1543 J
Explanation:
The work done by a force when moving an object is given by the equation:
where:
F is the magnitude of the force applied on the object
d is the displacement of the object
is the angle between the direction of the force and of the displacement
For the cart pushed in this problem, we have:
is the force applied by the man
is the displacement of the cart
is the angle between the directions of the force and of the displacement
Solving for W, we find the work:
Answer:
I would love to help but I don't know I'm so sorry
Answer:
Explanation:
Given:
Equation
Force, F = (2.00 N/m)x + (1.00 N/m2)x²
Mass, m = 3 kg
Displacement, x = 2.0 m
Workdone, W = F × dx
= integrating f with respect to dx,
F = (2.00 N/m)x + (1.00 N/m2)x²
W = 2x²/2 + x^3/3
At x = 2 m,
Workdone, W = (2)^2 + (2^3)/3
= 4 + 8/3
= 20/3 J
= 6.67 J
Using conservation of energy,
Workdone, W = kinetic energy
= 1/2 × M × v^2
6.67 = 1/2 × 3 × v^2
v = sqrt(4.44)
= 2.108 m/s
Answer:
Explanation:
Given
Weight of strut
Weight of sign Board
In this question angle which cable makes with horizontal is not given so
assuming
From Diagram
Moment about hinge point
in x direction is zero
in Y direction is zero therefore