You drag your 30 kg suitcase 1200 m thru the Chicago airport at essentially constant velocity 2.0 m/s, by pulling its handle 90 N mostly upward, but 20° Westward. Which of the following represents the average power you provided to the suitcase?

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

A sled is given a push across a horizontal surface. The sled has a mass m, the push gives it an initial speed of 3.40 m/s, and the coefficient of kinetic friction between the sled and the surface is 0.150. (a) Use energy considerations to find the distance (in m) the sled moves before it stops. m (b) What If? Determine the stopping distance (in m) for the sled if its initial speed is doubled to 6.80 m/s. m

Question 5.5b: A light string pulls a 0.510 kg block across a frictionless, horizontal table. At an instant when the block is moving to the right with a speed of 4.25m/s, the string exerts a tension T of magnitude 3.50N at an angle 8 = 27.5° above the block's velocity vector as shown in the figure. सिं o Determine the instantaneous power delivered to the block by the string.

Can someone help with second question? Thanks

Suppose the ski patrol lowers a rescue sled carrying an injured skiier, with a combined mass of 77.5 kg, down a 60.0° slope at constant speed, as shown in the Figure. The coefficient of kinetic friction between the sled and the snow is 0.100. b)How much work, in joules, is done by the rope on the sled over this distance?

A cart loaded with bricks has a total massof 20.5 kg and is pulled at constant speed bya rope. The rope is inclined at 20.7◦ degrees above the horizontal and the cart moves25.2 m on a horizontal floor. The coefficientof kinetic friction between ground and cart is0.274.The acceleration of gravity is 9.8 m/s2.How much work is done on the cart by the rope?Answer in units of kJ.

Kindly provide the solution to the following question using the GRASS method. Work and Energy question, (Unit: Energy and Momentum):  While cleaning out the basement of your parents you come across a box of old toys with Transformers and GI Joes. You push the box along a smooth level surface with a force of 35 N at an angle of 25° below horizontal. If the box is accelerated from a speed of 0.60 m/s to 1.45 m/s over a distance of 3.5 m, what is the mass of the box?   The images attached are the formulas for this unit. Please make sure to show all your work using the GRASS method and using formulas from this unit (Energy and Momentum).

Assume that before the accident happened, the car was going at a constant velocity of 60Km/h on a level highway for a distance of 10.0km. The car accelerated briefly to 70.0Km/h to pass another car and then returns to 60.0Km/h as it descends the other side of the hill, even though the driver has taken her foot off the accelerator. Describe the energy transformations taking place when the engine was not doing the work.