A 660 kg race car is going around a curve with a radius of 25 m at a speed of 41.2 m/s. How much friction is required to keep the car on the road safely? a. 22987.1 N
b. 44812.4 N
c. 4987.6 N
d. 659.3 N

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.