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?​

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?