in the lab you will use a cart and track to explore various aspects of motion you will measure and record the time it takes the cart to travel certain distances and then complete some calculations

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Explanation:

It is given that by using track and cart we can record the time and the distance travelled and also the speed of the cart can be recorded. With all this data we can solve questions on the laws of motion.  

Like using the first law of motion we can determine the force of gravity acting on the cart that has moved a certain distance and the velocity or the speed of card has already been registered and since time is known putting the values in formula would help us calculate the gravitational pull acting on cart.

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coil wire, increase current, put iron inside the coil

the answer would be c. motion and direction

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