Answer:
3
Explanation:
The mechanical advantage is the ratio of the output force to the input force.
MA = 156 / 52
MA = 3
Work= (force)(distance)
178= m(9.81)x0.5
178=m(4.905)
178/4.905=m
His mass is 36.3 kg
Answer:
17m/s
Step by step explanation:
Using g= 10m/s²
Maximum H = (u²sin²theta) /2g
12 = u² sin²(45)/2(10)
12 = u²(0.72)/20
0.72 u²= 240
u² = 240/0.72 = 333.33
Initial velocity = 18.3m/s
For the mass m, attached to a spring, to move in a circle centripetal force and restoring force of the spring must be equal. Centripetal force is given with this formula:
Restoring force only occurs if the spring is stretched. If L is the length of unstretched spring we have the following formula for restoring force:
r is the length of a circle that mass m is traveling along.
As said above, these two forces have to be equal:
We solve for r:
r(w) will go to infinity when denominator is equal to zero:
Please keep in mind that Hooke's law has it's limitations, and before we reach our critial value of angular velocity spring will be strecthed to a point where Hooke's law does not aply anymore.