A rock is suspended from a string; and it accelerates upward. Which statement is true concerning the tension in the string? The tension is greater than the weight of the rock. The tension is less than the weight of the rock. The tension points downward. The tension is equal to the weight of the rock.

(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 8.00 x 10¯° kg hangs motionless on it. (Enter a number.) 0.000784 N (b) Calculate the tension (in N) in a horizontal strand of spiderweb if the same spider sits motionless in the middle of it much like the tightrope walker in the figure. 5.0° 5.0° T. TR w T. TR The strand sags at an angle of 15.0° below the horizontal. (Enter a number.) 0.046688914 X N Compare this with the tension in the vertical strand (find their ratio). (Enter a number.) (tension in horizontal strand) / (tension in vertical strand) =

An elevator is supported by a cable and moving downward through the elevator shaft at a constant speed. How does the upward tension force compare to the downward force of gravity? O The upward tension force is stronger than the downward force of gravity. The downward force of gravity is stronger than the upward tension force. The tension force and the force of gravity are of equal strength.

An elevator cab that weighs 23.2 kN moves upward. What is the tension in the cable if the cab's speed is (a) increasing at a rate of 1.02 m/s? and (b) decreasing at a rate of 1.02 m/s?? (a) Number i Units (b) Number i Units