A boy swings a stopper on a string in a circle. The radius of the circle is 2 meters. If the stopper makes a complete circle every 0.7s, what is the linear velocity of the stopper?
(7 points)

The photo above shows oil and vinegar in a pitcher. the top make a claim about about the density of the vinegar compared to the density of the oil summarize the evidence to support the claim and explain your reasoning

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked

Aforce of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart? 865 kg 320 kg 12.1 kg 3.12 kg