i appreciate the help. please help as soon as possible

1. A 0.66-kg object with an initial velocity of 2.80 m/s in the positive x-direction is acted on by a force in the direction of motion. The force does +6.50 J of work. What is the nal velocity of the object?(Neg|ect friction) _____A| m/s 2. Car 1 has 8 times the mass of car 2, but only 0.7 as much kinetic energy. What is the ratio between the speeds of the two cars (VI/V2)? You must type your answer as a numerical value. :'_::i 3. A record was set for stair climbing when a man ran up the 2400 steps of the Empire State Building in 11 minutes and 20 seconds. If the height gain of each step was 0.2 m, and the man's mass was 70.0 kg, what was his average power output during the climb? :lw 4. The drawing shows a version of the loop-the-Ioop trick for a small car. If the car is given an initial speed of v = 4.8 m/s, what is the largest value that the radius rcan have if the car is to remain in contact with the circular track at all times? ::lm 5. A boy pulls a 29.0-kg box with a 130-N force at 32 above a horizontal surface. If the coefficient of kinetic friction between the box and the horizontal surface is 0.22 and the box is pulled a distance of 38.0 m, what is the net work done on the box? J 6. A 29.00-kg child initially at rest slides down a playground slide from a height of 2.30 m above the bottom of the slide. If her speed at the bottom is 2.20 m/s, how much energy ls lost due to friction? i J