Скачать или смотреть Stewart Calculus | Related Rate | Two carts connected by a pulley (imperial system)

Two carts, A and B, are connected by a rope 35 ft long that passes over a pulley P. (See the figure.) The point Q is on the floor 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 4 ft/s. How fast is cart B moving toward Q at the instant when cart A is 9 ft from Q?

Two carts, A and B, are connected by a rope 35 ft long that passes over a pulley P. (See the figure.) The point Q is on the floor 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 4 ft/s. How fast is cart B moving toward Q at the instant when cart A is 9 ft from Q?

Two carts, A and B, are connected by a rope 35 ft long that passes over a pulley P. (See the figure.) The point Q is on the floor 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 4 ft/s. How fast is cart B moving toward Q at the instant when cart A is 9 ft from Q?