b) You pull a 20-kg sled, exerting an unbalanced, horizontal force of 30 N on it for 10
seconds. (1) What is the acceleration of the sled? (2) What is the speed of the sled after 3
seconds? (3) What force do you need to exert on the sled if you wish to keep it going at
that constant velocity?
Y+
| /\
| - | 30 N +
| 20kgO---->
| |
| \/
|_____________X +
Acceleration = Force
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Mass
Acceleration= 30N
-----
20kg
Acceleration = 1.5m/s
Speed of sled after 3 seconds is 4.5 m/s assuming pulling the sled started from a 0 velocity
An opposing force at the same rate of acceleration is needed to keep the sled moving at a constant velocity
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What is "An opposing force at the same rate of acceleration "?
ReplyDeleteGrade = 1/1