The housewife pushes a full cart of food, weighing 70 kg, on the floor of the supermarket. The initial speed of the trolley is zero and the acceleration of the trolley is 0.12 m / s2. The coefficient of friction between the wheels of the cart and the floor is 0.008. (a) How much force does the housewife push the cart? (b) How much work does the housewife do on the first 10 m of the road? (c) What is the average strength of the housewife on that journey?​

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is