7. As kids sled down a hill: (3pt) a. Their potential energy will (increase, decrease, or stay the same).
b. Their kinetic energy will (increase, decrease, or stay the same).
c. Their total energy (PE + KE) will (increase, decrease, or stay the same).

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

Which two particles are found in the center of an atom

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.