Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force of 60.0 N at an angle of 37.0o upward from the horizontal. If he pulls her a distance of 12.0 m, What is the work done by Matthew? a. 185 J b. 433 J  c. 575 J d. 720 J

For the three cases shown below, assuming the displacement is 4.0 m to the right. Match the answers with questions. 10 N 8 N 6 N 60° the work done by the 10-N force + the work done by the 8-N force + the work done by the 6-N force A. OJ В. 32J С. 16] D. 40J Е. 24]

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9. AV R 6121W Higgins A.Nouvel onglet R 2634 W catalpa.. Physics 235-Spring 2023 Chapter 7 Worksheet The cable of a crane is lifting a 750 kg girder. The girder increases its speed from 0.25 m/s to 0.75 m/s in a distance of 3.5 m. a. How much work is done by gravity? b. How much work is done by tension?

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).

Your answer is partially correct. A floating ice block is pushed through a displacement d 27.0 m Ji - (24.0 m )j along a straight embankment by rushing (298 N )i – (183 N ) water, which exerts a force on the block. How much work does the force do on the block during the displacement? Number i 3654 Units

An object of mass m can only move on the +z axis. It is subjected to a force in the +z direction given by F(x) = the origin. a. How much work does this force do if the object moves from z = a b. If at a the block had an initial velocity of magnitude vo in the +z direction, what is its velocity at b if no other force is acting on the object? am where a is a constant and z is the distance from to z = b?

7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C,…

Wfric Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 kg down a 60° slope at constant speed, as shown in the figure. The coefficient of friction between the sled and the snow is 0.100. = (a) How much work is done by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures Wrope 1.47 × 10³ J = W grav 60° (b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to find the tension. Enter to 3 significant figures W -2.39x104 T = 2.55×104 J (c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures

The figure shows a block of mass 10 Kg. Determine what work will be done by the force F that will lift said block with constant speed to a height of 18 m. µ = 0.3 a. 2931 J b. 4870 J c. 61 J d. 37 J e. 1262 J