Rope Pulley Hoist
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| 2 TON 4 WHEEL ROPE BLOCK AND TACKLE PULLEY HOIST TOOL | |
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$16.99 Time Remaining: 9h 50m |
| MANUAL 4 WHEEL ROPE BLOCK AND TACKLE PULLEY HOIST TOOL LIFT PULLY RIGGING TOOL | |
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$29.99 Time Remaining: 15h 26m Buy It Now for only: $29.99 |
Rope Pulley Hoist
Homework help!?
1) A basket of mass 11.8 kg is hoisted with constant speed by a rope and pulley. If the rope between pulley and pulling person makes an angle q with the vertical of 69 degrees, what is the tension T (in N) in the rope? (assume no friction here)
2) Two masses, m1 = 7 kg, and m2 = 6 kg are connected with a rope running without friction over a pulley. What is the acceleration of mass m2 in m/s2? Use upward as positive.
3.) A sphere of mass of 1.43 kg is accelerated upwards by a string to which the sphere is attached. Its speed increases from 2.71 m/s to 5.16 m/s in a time of 2.46 s. Calculate the tension in the string, assuming that the tension remains constant during that time.
1) the angle is irrelevant
T=11.8*9.81=116 N
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2) FBD of 6 kg:
T-6*g=6*a
FBD of 7 kg
7*g-T=7*a
solve for a
7*g-6*g=7*a+6*a
a=g/13
a=0.755 m/s^2
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3)
use v(t)=v0+a*t to find a
a=(5.16-2.71)/2.46
F=m*a
F=1.43*((5.16-2.71)/2.46+9.81)
15.5 N
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Couch Hoist