(II) A 14.0-kg bucket is lowered vertically by a rope in which there is 163 N of tension at a given instant. What is the acceleration of the bucket? Is it up or down?

Which is greater? Which has a greater horizontal component, a 100-N force directed at an angle of 60° above the horizontal or a 60-N force directed at an angle of 30° above the horizontal?

w25 A student weights 700 N is in elevator at rest:(a) How much would a student weight if the elevator accelerates upward at 2m/s2 as in fig(a).(b) How much would a student weight if the elevator accelerates downward at .2m/s2 as in fig(b)

(II) A particular race car can cover a quarter-mile track (402m) in 6.40s starting from a standstill. Assuming the acceleration is constant, how many "g's" does the driver experience? If the combined mass of the driver and race car is 535 kg, what horizontal force must the road exert on the tires?

. (II) A flatbed truck is carrying a heavy crate. The coefficient of static friction between the crate and the bed of the truck is 0.75. What is the maximum rate at which the driver can decelerate and still avoid having the crate slideagainst the cab of the truck?

(II) At the instant a race began, a 65-kg sprinter exerted a force of 720 N on the starting block at a 22° angle with respect to the ground. (a) What was the horizontal acceleration of the sprinter? (b) If the force was exerted for 0.32 s,with what speed did the sprinter leave the starting block?

Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to simulate gravity is to shape the spaceship like a cylindrical shell that rotates, with the astronauts walking on the inside surface (Fig. 5–33). Explain how this simulates gravity. Consider (a) how objects fall, (b) the force we feel on our feet, and (c) any other aspects of gravity you can think of. FIGURE 5–33 Question 9.

(II) What will a spring scale read for the weight of a 58.0-kgwoman in an elevator that moves (a) upward with constantspeed (b) downward with constant speed 5.0 m/s(c) with an upward acceleration 0.23 g, (d) with a downwardacceleration 0.23 g, and (e) in free fall?

The mass of a given airplane at sea level (g = 9.81 m/s2) is 10 tons. Find its weight in N when it is travelling at a 15 250 m elevation. The acceleration of gravity g decreases by 0.000 003 33 m/s2 for each meter of elevation. (answer in whole number)