A doctor pushes the plunger of syringe down and then pulls it up to a draw liquid into a syringe? give reason please help me wit
1 answer:
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Answer:
the minimum value of torque is 101.7 N-m.
Explanation:
Given that,
Mass of bundle of shingles, m = 30 kg
Upward acceleration of the shingles,
The radius of the motor of the pulley, r = 0.3 m
Let T is the tension acting on the shingles when it is lifted up. It can be calculated as :
T-mg=ma
T=m(g+a)
Let is the minimum torque that the motor must be able to provide. It is given by :
the minimum value of torque is
Answer:
0.06 A
Explanation:
We have given mass =0.954 kg
velocity =1.27 m/sec
efficiency =0.361 the output kinetic energy of the motor
Efficiency =0.361
so input to the motor = output/efficiency
so input to the motor =
we know that where E is energy and T is time so
We know that power P=VI we have given V=4.5 VOLT
So current