Physics Questions & Answers

Physics Questions & Answers A boat moving at 4m/s north, with a wind coming from the east at 3 m/s gives you a net vector of what? - CORRECT ANSWER- 5m/s NE acceleration - CORRECT ANSWER- Change in velocity over change in time Acceleration - CORRECT ANSWER- The rate of change in velocity. Can be a change in direction, positive (speeding up) or negative (slowing down). Balanced Force - CORRECT ANSWER- Two forces in opposite directions. Net force is zero and the motion of the object does not change. Contact forces - CORRECT ANSWER- Contact forces work when two or more objects are touching. Some examples of this are: friction, air resistance, tension in ropes and normal contact force. When these two or more objects interact there is a force on both of them and is equal or opposite of the other object. displacement - CORRECT ANSWER- the total distance traveled by an object regardless of direction Displacement vs Time Graph - CORRECT ANSWER- Shows the distance an object travels in a certain amount of time. slope is velocity distance - CORRECT ANSWER- the amount traveled from a certain spot. Example of speed - CORRECT ANSWER- Nemo swims 58 m/s Example of velocity - CORRECT ANSWER- Nemo swims 37 m/s South to Wallaby Way in Australia.