Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled is moving at a constant speed of 9.25 m/s, and the tow rope (parallel to the ground) makes an angle of 35.0°, with respect to the velocity of the sled (see the figure below). 35.0⁰ If the tension in the rope is 49.0 N, determine the work done (in J) on the sled by the tension in the rope in 10.5 s. J

1480 kg car accelerates uniformly from a position of rest to a speed of 95 km/h in 6.0 s. a) Calculate the car's acceleration. b) How far did the car travel during this acceleration?  b) How much work was done by the car during this 6.0 s?

As shown in the figure below, three blocks with masses m₁ = 4.8 kg, m2 = 14 kg, and m3 = 18 kg, respectively, are attached by strings over frictionless pulleys. 1711 m2 ms The horizontal surface exerts a 32 N force of friction on m2. If the system is released from rest, use energy concepts to find the speed (in m/s) of m3 after it moves down 3.0 m. m/s

Question 3

1.1 A sled is dragged 8.0 m along a horizontal path at a constant speed of 0.30 m/s by a rope that is inclined at an angle of 25° above the horizontal. The tension in the rope is 450 N. What was the magnitude of the work done by the rope on the sled?

Suppose a 85 kgkg sprinter, starting from rest, runs the first 14 mm in 3.0 ss at constant acceleration, a reasonable model. a. What is the magnitude of the horizontal ground force acting on the sprinter? b.What is the sprinter's power output at 1.0 ss, 2.0 ss, and 3.0 ss?

i cant figure out how to solve work problems with unit vector notation