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answerhappygod
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1,2,3,4,5
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1. A 5000 kg car is accelerated from restA 5000-kg car accelerated from rest to 20 m/s. Determine the net work done on the car.(Hint: @rest initial vel =0, final velocity is given, use the formula for net work done based on work-energy theorem) [A-4] 2. Many satellites move in elliptical orbits (Figure 3). Scientists must understand the energy changes that a satellite experiences in moving from the farthest position A to the nearest position B. A satellite of mass 6.85 x 10^3 kg has a speed of 2.81 x 10^3 m/s at position A, and speed of 8.38 x 10^3 m/s at position B. Determine the work done by Earth's gravity as the satellite moves (a) from A to B (b) from B to A Assignment #1: Work and K.E Figure 3 Earth elliptical orbit B [C-4] Total 20 marks 3. A loaded grocery cart of mass 24.5 kg is pushed along an aisle by an applied force of 14.2 N [22.5° below the horizontal]. How much work is done by the applied force if the aisle is 14.8 m long? [T/A -4] 4. A child does 9.65 x 10^2 J of work in pulling a friend on a sleigh 45.3 m along a snowy horizontal surface (Figure 10). The force applied by the child is 24.1 N [parallel to the handle of the sleigh]. What angle relative to the snowy surface is the handle oriented? [A - 4] 5. An ice skater of mass 55.2 kg falls and slides horizontally along the ice travelling 4.18 m before stopping. The coefficient of kinetic friction between the skater and the ice is 0.27. Determine, using the work-energy theorem, the skater's speed at the instant the slide begins. [A/T-4]
1. A 5000 kg car is accelerated from restA 5000-kg car accelerated from rest to 20 m/s. Determine the net work done on the car.(Hint: @rest initial vel =0, final velocity is given, use the formula for net work done based on work-energy theorem) [A-4] 2. Many satellites move in elliptical orbits (Figure 3). Scientists must understand the energy changes that a satellite experiences in moving from the farthest position A to the nearest position B. A satellite of mass 6.85 x 10^3 kg has a speed of 2.81 x 10^3 m/s at position A, and speed of 8.38 x 10^3 m/s at position B. Determine the work done by Earth's gravity as the satellite moves (a) from A to B (b) from B to A Assignment #1: Work and K.E Figure 3 Earth elliptical orbit B [C-4] Total 20 marks 3. A loaded grocery cart of mass 24.5 kg is pushed along an aisle by an applied force of 14.2 N [22.5° below the horizontal]. How much work is done by the applied force if the aisle is 14.8 m long? [T/A -4] 4. A child does 9.65 x 10^2 J of work in pulling a friend on a sleigh 45.3 m along a snowy horizontal surface (Figure 10). The force applied by the child is 24.1 N [parallel to the handle of the sleigh]. What angle relative to the snowy surface is the handle oriented? [A - 4] 5. An ice skater of mass 55.2 kg falls and slides horizontally along the ice travelling 4.18 m before stopping. The coefficient of kinetic friction between the skater and the ice is 0.27. Determine, using the work-energy theorem, the skater's speed at the instant the slide begins. [A/T-4]