Hiii can someone help me

1. How long will it take a ball kicked with an initial velocity of 12 m/s at an angle of 30 to the horizontal to reach the ground? Show your calculations and rearranged formulas (with substitution) for full marks. (4 marks) 2. A ball, mass of 120 g, is rolling with an initial velocity of 2.0 m/s off the top of a building 60 m tall. What is the speed of the ball when it is 15 m above the ground? Show your calculations and substitution. No need for rearrangement of the formula. (5 marks) 3. Spheres A, B, and C have masses of 45 kg, 75 kg, and 90 kg, respectively. What is the net gravitational force of attraction on sphere C? (6 marks) 45 kg 75 kg 90 kg 50 cm4. Chris has a mass of 80.0 kg. He swings on a 5.00 m long rope. If the rope can withstand a maximum tension of 1.20 x 10 N, what is the maximum speed Chris can achieve without the rope breaking at the bottom of his swing? Show your calculations and rearranged formulas (with substitution) for full marks. (5 marks) 5. Penelope and Michael are wildlife photographers for a well-known nature magazine. At one point in their day, Penelope climbs down from their hidden blind, which is located 3.00 m up a tree, in order to get additional film from their truck, which is parked a short distance away. As she is returning to the blind, Michael notices a cheetah 100 m away. The cheetah immediately begins to run after Penelope with an acceleration of 4.00 m/s2. Given that Penelope has a mass of 50.0 kg and her center of mass is 0.880 m above the ground, how much power must Michael exert in order to pull her up into the blind before the cheetah reaches her