Chapter 4: Q5. (page 100)
What causes the boat in Fig. 4-41 to move forward?
(a) The force that the man exerts on the paddle
(b) The force that the paddle exerts on the water
(c) The force that the water exerts on the paddle
(d) The motion of the water itself
The correct option is (c).
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A box weighing 77.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end (Fig. 4โ45). Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs (a) 30.0 N, (b) 60.0 N, and (c) 90.0 N.
A golf ball is hit with a golf club. Which force(s) act(s) on the ball when the ball flies through the air? Neglect the air resistance.
(a) The force of the golf club acting on the ball
(b) The force of gravity acting on the ball
(c) The force of the ball moving forward through the air
(d) All the above
(e) Both (a) and (c)
Question: (II) The block shown in Fig. 4โ59 has massand lies on a fixed, smooth, frictionless plane tilted at an angle ofto the horizontal. (a) Determine the acceleration of the block as it slides down the plane. (b) If the block starts from rest at 12.0 m above the plane from its base, what will be the block's speed when it reaches the bottom of the incline?
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 slide against the bed of the truck?
Two snowcats in Antarctica are towing a housing unit north, as shown in Fig. 4โ50. The sum of the forcesandexerted on the unit by the horizontal cables is north, parallel to the line L, andDetermineand the magnitude of.
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