Hodor and Bran must cross a horizontal frictionless 12-m long ice bridge. From one foot of the bridge, Hodor pulls Bran who is sitting on a sled by a 150-N force that makes an angle of 30° with the horizontal. Find: (2) the work done by Hodor, (b) the change in the kinetic energy of Bran and the sled, and (c) the speed of Bran and the sled at the end of the bridge if initially, they are at rest. Bran and the sled have a combined mass of 280 kg.
Hodor and Bran must cross a horizontal frictionless 12-m long ice bridge. From one foot of the bridge, Hodor pulls Bran who is sitting on a sled by a 150-N force that makes an angle of 30° with the horizontal. Find: (2) the work done by Hodor, (b) the change in the kinetic energy of Bran and the sled, and (c) the speed of Bran and the sled at the end of the bridge if initially, they are at rest. Bran and the sled have a combined mass of 280 kg.
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Transcribed Image Text:2. Hodor and Bran must cross a horizontal frictionless 12-m long ice bridge. From one foot of the bridge,
Hodor pulls Bran who is sitting on a sled by a 150-N force that makes an angle of 30° with the
horizontal. Find: (2) the work done by Hodor, (b) the change in the kinetic energy of Bran and the
sled, and (c) the speed of Bran and the sled at the end of the bridge if initially, they are at rest. Bran
and the sled have a combined mass of 280 kg.
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