Answer:
17 m
Explanation:
Work done is the product of force and perpendicular distance moved, therefore, expressed as
W=Fd
Where F represent the applied force, d is perpendicular distance and W is work done.
Making d the subject of the formula then
Substituting 68 J for work and 4 N for force then
Therefore, the distance is equivalent to 17 m
Answer:
Efficiency = 75%
M.A = 1500
Explanation:
Efficiency is given by the formula;
E = (work output/work input) × 100%
Work output = 500 × 1.5 = 750 J
We are given the work input as 1000 J.
Thus;
Efficiency = (750/1000) × 100% = 75%
Now, to find the mechanical advantage;
Efficiency = (M.A/V.R) × 100
75 = (M.A/5) × 100
M.A = 100 × 75/5
M.A = 1500
Answer:
The final speed of the two carts is 1 m/s.
Explanation:
let m = 0.5 kg being the mass of the cart moving at an intial speed of v = 4 m/s and M = 1.5 kg is the mass of the cart at rest V = 0 m/s.
then by conservation of linear momentum, the final speed of the objects Vf is:
m×v + M×V = Vf×(M + m)
Vf = [m×v + M×V]/(M + m)
Vf = [(0.5 kg)×(4 m/s) + (1.5 kg)×(0 m/s)]/(1.5 + 0.5 kg)
= 1 m/s
Therefore, the final speed of the two carts is 1 m/s.
Answer:
The direction of the net force is in the same direction as the acceleration. So for an object moving in a circle, there must be an inward force acting upon it in order to cause its inward acceleration. This is sometimes referred to as the centripetal force requirement.
Explanation:
Only units of the SI and those units recognized for use with the SI are used to express the values of quantities. Equivalent values in other units are given in parentheses following values in acceptable units only when deemed necessary for the intended audience.