Question 3 A block of mass m = 1 kg is sliding on a horizontal surface with initial velocity vo 2 m/s. The block is brought to a stop by kinetic friction in a distance of 4 m. What is the work done by the force of friction acting on the block? O2J -0.5 J -2 J 08 J O 0.5 J -8 J 1 pts Question 4 1 pts

A 5 kg ball is shot straight up with an initial speed of 20 m/s . When the ball reaches height 10 m, the balls speed is 10 m/s. The work done on the ball by the force of air resistance , up to this height is equal to? A- 260J B- 490J C- 500 J D- 510J E- 750J

2. An ocean diver swims upwards against the drag force exerted by the water. This force varies in magnitude by depth (d) and is given by F(d)=√d, where y=100 N/m ¹/2. If the diver ascends from a depth of d=10m to the surface (d=0), what is the work done by this drag force? Why is this work negative?

A 3.5-kg object falls vertically downward in a viscous medium at a constant speed of 1.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 50 cm?   Question 11 options:   +2.0 J   -8.5 J   +17 J   −17.0 J   −32 J

An object is acted on by the force shown in the figure(Figure 1). What is the final position of the object if its initial position is x = 0.40 m and the work done on it is equal to 0.21 J?

2. A cart is pulled a distance D on a flat, horizontal surface by a constant force F that actsat an angle θ with the horizontal direction. The other forces on the object during thistime are gravity (Fw), normal forces (FN1) and (FN2), and rolling frictions Fr1 and Fr2,as shown below. What is the work done by each force?

A Net Force Fnet=(x-3x2)i + (2y2-y3)j acts on a 3.5 kg particle. a) Calculate the net work done on the particle as it moves from (1.0m,0.0m) to (1.0m,4.0m). b) At (x,y) = (1.0m,0.0m), the particle's speed is 5.0 m/s. Find the particle's speed at (x,y) = (1.0m,4.0m).

A 5.0-kg object is pulled along a horizontal surface at a constant speed by a 20 N force acting 37° above the horizontal. Work (in J) done by this force as the object moves 6.0 m is: 370 6 m a. 192 O b.65 Oc. 96 O d. 140

DIRECTION: CHOOSE THE CORRECT ANSWER F 1.A force of 5i+j+ 2k N displaced a body from a position of i+j+km to 2i +4j+ 6k m. How much work is done to displace it through this position? (A)18J (B)6J (C)12J (D)0J 2.Calculate the work done when a force of 2i+5j+ 5k N acts on a body when it produces a displacement of 2i + 4j+ 6k m. (A)54J (B)24J (C)50J (D)18J 3. A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 sec is (A)100 J (B) 300 J (D) 125 J 4) Consider an 80 kg man and 320 kg horse both running along a road with the same kinetic energy. (C)50 J The man must run (A) with the same speed as the horse. (CSS) 4 times as fast as the horse. (B) twice as fast as the horse. (D) 16 times as fast as the horse. 5)particle A is travelling at a velocity of []m/s. It collides with particle B which has a velocity of Jm/s. The particle move together. The mass of particle A is 2kg and the…

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?     90 J     0 J     45 J     180 J