Complete the lab and answer the questions in the essay box below. What happens to the cart?

Was an external force acting on the cart?

What was the momentum of the cart before the "explosion"?

What was the momentum of the cart after the "explosion"?

Do discrepancies exist?

Look at where m1d1 equals -m2d2 and where they are not quite equal. How would you account for the slight error involved?

What was the momentum before the explosion?

Having explained the reason for the slight discrepancies, under ideal conditions (no friction) what would be the momentum of the system after the explosion?

A stick of dynamite is placed in the center of a pile of rocks and ignited. What is the total momentum of all the pieces after the explosion?

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.