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A 200-kg car is pushed slowly up an incline. How much work does the pushing force do in moving the cart up to a platform 1.5m above the starting point if friction is negligible?
A 1200-kg car going 30 m/s applies its brakes and skids to rest. If the friction force between the sliding tires and the pavement is 6000 N, how far does the car skid before coming to rest ?
Calculate /1.12.13.4ls and Is
R1 = 1kohms→I1
R2 = 1kohms→I2
R3 = 3kohms→I3
I4 R4→ 5K ohms
I5→6Kohms
R6→ 6K ohms
I6 ←
R7 2K ohms
How large a force is required to accelerate a 1300-kg car from rest to speed of 20m/s in a distance of 80m ?
Just before striking the ground, a 2.0-kg mass has 400 J of KE. If friction can be ignored, from what height was it dropped ?
1. Using the definition C = Q/V, show that for a SERIES connection of capacitors:
1/C1/C1+1/C2. What does this equation mean? What happens to C as more and more capacitors are connected in series? 2. Using the definition C = QV, show that for a PARALLEL connection of capacitors: C = C1 + C2. What does this equation mean? What happens to C as more and more capacitors are connected in parallel?
- A pile of 600 sheets of paper has a mass of 2 kg. The pile is 300 mm long, 200 mm wide, 50 mm thick. Calculate:
- The thickness of one sheet (2 marks)
- The mass of one sheet. (2 marks)
- The volume of the pile. (2 marks)
- The density of the paper. (2 marks)
Determine the amount of energy, in joules, stored in a defibrillator’s 17.0 μF capacitor that has a potential difference of 9.25 ✕ 105 V.
An iron wire with a diameter of 0.80mm will have a resistance of 0.4ohms. What resistance will the iron wire of 0.40mm diameter have if it has the same length as the iron wire?
Compute the minimum distance that a truck slides on a horizontal
asphalt road if it is traveling at 20 m/s. The coefficient of sliding
friction between asphalt and rubber tire is 0.50. The mass of the
truck is 8000 kg.
