smr101
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I've worked out (i), having problems with (ii). I know that the torque will be force x 0.75 but I haven't had any success in working out the force in the first place.
Force & Slope Question: Issues with (ii)
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I've worked out (i), having problems with (ii). I know that the torque will be force x 0.75 but I haven't had any success in working out the force in the first place.
Discussion
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What's the force required to accelerate the wagon if there's no incline?
smr101
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Bystander said:
Without an acceleration, I'm not sure.
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From the problem statement, "... accelerate the wagon from rest to 2.6 m/s over a distance of 8.2 m at constant acceleration ..."smr101 said:
smr101
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Bystander said:
Right I've got the acceleration but I'm not getting the correct force. You're saying the force needed to work out the torque is when there is no incline?
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No. You've got the force to do the acceleration? Can you calculate the force necessary to move the wagon up the incline? Add them.smr101 said:
smr101
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Bystander said:
F = ma
= 1920 x 0.41
= 787.2
Fw = mgsinangle
= 1920 x 9.81 x sin10
= -10246.7
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Don't just punch numbers into a calculator and blindly accept the number that comes out. What's the sin of 10°?smr101 said:
smr101
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Bystander said:
Ah, I was in radians...
Fw = mgsinangle
= 3270.7
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Better.
smr101
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Bystander said:
Then just add the Ff to that and the Fu I've got it... Thanks, I've made that much more difficult than it should have been!
smr101
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I'm assuming the torque needed for the drum, which would be used to calculate the total torque needed by the motor is the same? Just different values.