Vertical Motion
Load of weight 7kN being raised with constant acceleration by a cable. After it has been raised 20m, the cable becomes slack. The load continues for 4m before coming to instantaneous rest.
a) state the mas of the load (done this)
b) draw the velocity-time graph for the motion of the load. Use this to find the acceleration.
c) find the tension in the cable before it becomes slack.
Bit confused about b? Feels like there isn't enough information, but I must be missing something?
a) state the mas of the load (done this)
b) draw the velocity-time graph for the motion of the load. Use this to find the acceleration.
c) find the tension in the cable before it becomes slack.
Bit confused about b? Feels like there isn't enough information, but I must be missing something?
Original post by Dusky Mauve
Load of weight 7kN being raised with constant acceleration by a cable. After it has been raised 20m, the cable becomes slack. The load continues for 4m before coming to instantaneous rest.
a) state the mas of the load (done this)
b) draw the velocity-time graph for the motion of the load. Use this to find the acceleration.
c) find the tension in the cable before it becomes slack.
Bit confused about b? Feels like there isn't enough information, but I must be missing something?
a) state the mas of the load (done this)
b) draw the velocity-time graph for the motion of the load. Use this to find the acceleration.
c) find the tension in the cable before it becomes slack.
Bit confused about b? Feels like there isn't enough information, but I must be missing something?
You'll need to assume the load start from rest, but other than that it should be fine.
If you start with the second part of the motion where the cable is slack, you can work out the velocity at that point, and also how long it takes to come to rest.
From the initial velocity in the last part, you can now work out the acceleration in the first part of the motion, etc.
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