A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the weight?

A lift that weighs 300N moves a man with a weight of 950N upwards by 12m. How much work is done to move the lift this height?

A 5 kg object is lifted 10 meters vertically upward. What is the work done against gravity? (Assume g=9.8m/s²)Select one:a.490 Jb.100 Jc.50 Jd.980 J

A mechanical jack is used to lift a car.(i) (1 mark)If a 1300 kg car is raised 0.28 m, how much work was done on the car?(ii) (1 mark)If the lever was pushed a total distance of 5.1 m at constant force, how large was the force applied? Assume 100% efficiency.(iii) (3 marks)Now suppose the jack is only 60% efficient. The person operating the jack supplies 75 W of power. How long does it take to lift the car the 0.28 m distance?

How much work W is done in lifting a 30-kg sandbag to a height of 9 m? (Use 9.8 m/s2 for g. Round your answer to the nearest integer.)W =

A boy lifts a 1 kg block by 1 m. The work done by the boy is: (g = 9.8 metre per second squared)