can you please help me with this assignment, please show all the work.

This is Physics 20 (grade 11)- Module 6 - Lesson 4 - Work and Power

Question 3 A garage door opener is rated at 260 W. How much work can it do if it runs for 13.0 s? Not yet answered Calculate the work in units of Joules, rounded to three significant figures. Use scientific Marked out of notation if appropriate. 1.00 Flag For example is your answer is 1355 Joules, you would enter: 1.36E3 question Answer: Question 4 A truck's engine exerts an average net force of 750 N to move the truck at a constant speed of Not yet answered 78.0 km/h on a level road. Marked out of Calculate the power output of the engine, in units of Watts (round to 3 significant digits). 1.00 Flag question Answer:Question 5 A traditional, double-seat chair lift can move 1500 people per hour. The lift moves skiers from the Not yet answered bottom of the hill up to the top of the hill for a total height gain of 120 m. Assume the average Marked out of mass of a skier is 60.0 kg. 1.00 Calculate the POWER required to move 1500 people per hour up 120 m. Answer in units of Flag question watts (W), or kilowatts (KW), rounded to 3 significant figures. Answer: Question 6 A High-Speed Chairlift can move 2600 skiers up a height gain of 90 m in just 30.0 minutes. The Not yet answered average mass of a skier is 60.0 kg. Marked out of Calculate the power required to move 2600 people 90 m in this time. Answer in units of 1.00 Watts (W) or kiloWatts (KW), rounded to 3 significant figures. Flag question Answer:Question 7 Please type or upload any pictures showing the work you did to calculate the power used by the Not yet answered two ski lifts (Traditional and High-Speed) in the previous two questions. Marked out of 2.00 Show all your work (formulas, units, etc) and summarize answers with paraphrased sentences. Flag question Paragraph B EQuestion 8 An electric motor has a power rating of 1.41 kW. The motor is used to lift a 4000 kg load of steel Not yet answered pipes on a construction site. Marked out of If the motor is 66% efficient, how long would it take to raise the load of pipes from the ground up 2.00 to the top of a 40 m tall building. Flag question Answer in units of seconds (using scientific notation as appropriate). Round your answer to 3 significant figures