5. An elevator has a mass of 1000kg. a. What is the tension force on its cables when it is stationary?
b. What force is needed to accelerate it upward at a rate of 2 m/s??
c. What force is needed to accelerate it downward at a rate of 2 m/s??

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?