3a. Jill has a mass of 50 kg and rides her 5 kg bicycle up a...
3a. Jill has a mass of 50 kg and rides her 5 kg bicycle up a 20% grade at 4.5 m/s. Cd = 0.9; A = 0.25m2; p = 1.2 kg/m3. Assume there is no rolling resistance. What is her mechanical power output? How fast can Jill ride on level-ground?
Homework Answers
A woman rides a bicycle down a hill with a 15% slope (rise/run). The combined mass...
A woman rides a bicycle down a hill with a 15% slope (rise/run). The combined mass of the bicycle plus woman is 50 kg. She is riding into a 20-km-per hour wind. The only forces acting on the woman are drag force and weight. If the woman and bicycle together have a projected area of 1.0 m2, and the coefficient of drag is 1.1, how fast is the bicycle going relative to the ground? The density of air is 1.23...
A force of 5500 N gives Sally a little push forward as she rides her bicycle....
A force of 5500 N gives Sally a little push forward as she rides her bicycle. At the same time air resistance pushes against her with a force of 100 N. If she starts with a speed of 2.0 m/s and is on a level road, how fast will she be moving after 30 m? The mass of the bicyclist and her bicycle is 120 kg.
15a. [1 mark) A girl rides a bicycle that is powered by an electric motor. A...
15a. [1 mark ]A girl rides a bicycle that is powered by an electric motor. A battery transfers energy to the electric motor. The emf of the battery is 16 V and it can deliver a charge of 43 kC when discharging completely from a full charge.The maximum speed of the girl on a horizontal road is 7.0 m s' with energy from the battery alone. The maximum distance that the girl can travel under these conditions is 20 km.Show...
Figure 5 shows a crate has a mass of 50 kg and the coefficient of static...
Figure 5 shows a crate has a mass of 50 kg and the coefficient of static friction between the crate and the plane is us = 0.25. (1) Determine the minimum horizontal force P required to hold the crate from sliding down the plane. (8 marks) Determine the minimum force P required to push the crate up the plane. (8 marks) (11) P 30° Figure Q5
c) 353 J 13. A 200 kg roller coaster starts from 50 m above the ground....
c) 353 J 13. A 200 kg roller coaster starts from 50 m above the ground. (a) 5 It falls toward the ground with out any friction then once it ((c) reaches the ground level, the brakes are applied over 30 m 19. A in order to bring the coaster to a complete stop. How much ms-1 work is done by the brakes? 20 N (a) 10 x10 J (c)-10 x10 J 14. A 7 kg ball is dropped from...
show all work will thumbs up 5, A certain tank has a circular bottom area A 25 m2. It is drained by a pipe whose linear resistance is R = The tank contains water whose mass density is 1000 kg/m 12...
show all work will thumbs up
5, A certain tank has a circular bottom area A 25 m2. It is drained by a pipe whose linear resistance is R = The tank contains water whose mass density is 1000 kg/m 120 m.s a) How long will it take for the tank to empty if the water height was initially 16 m? b) Suppose we dump water into the tank at a rate of 0.1 m3/s. If the tank is initially...
Additional info: Meal = 1720 Kilocalories Mass of myself = 50 kg The Joule () is...
Additional info:
Meal = 1720 Kilocalories
Mass of myself = 50 kg
The Joule () is the SI unit of energy. (J = kg:m? S2 A calorie is another unit of energy. The definition of a calorie is the amount of heat (energy) necessary to raise the temperature of Ig of water by 1° Celsius. Ig of water occupies 1 milliliter (ml) = 1 cubic centimeter (cm) of volume. lkcal=4186J Energy comes in many forms and energy may be converted...
Problem 7 The turbine rotor of ship of mass 6,000 kg has a radius of gyration 50 cm. It rotates at 1,820 rpm clockwise when looking from the stern (rear). Determine the effects set up of the foll...
Problem 7 The turbine rotor of ship of mass 6,000 kg has a radius of gyration 50 cm. It rotates at 1,820 rpm clockwise when looking from the stern (rear). Determine the effects set up of the following:- i. If the ship when traveling at 80 cm/h, steers to the left in a curve of 70 m radius. ii. If the ship is pitching and the bow is descending with the maximum velocity. The pitching is simple harmonic, periodic time...
A woman rides a bicycle down a hill with a 15% slope (rise/run). The combined mass of the bicycle plus woman is 50 kg. She is riding into a 20-km-per hour wind. The only forces acting on the woman are drag force and weight. If the woman and bicycle together have a projected area of 1.0 m2, and the coefficient of drag is 1.1, how fast is the bicycle going relative to the ground? The density of air is 1.23...
Figure 5 shows a crate has a mass of 50 kg and the coefficient of static friction between the crate and the plane is us = 0.25. (1) Determine the minimum horizontal force P required to hold the crate from sliding down the plane. (8 marks) Determine the minimum force P required to push the crate up the plane. (8 marks) (11) P 30° Figure Q5
c) 353 J 13. A 200 kg roller coaster starts from 50 m above the ground. (a) 5 It falls toward the ground with out any friction then once it ((c) reaches the ground level, the brakes are applied over 30 m 19. A in order to bring the coaster to a complete stop. How much ms-1 work is done by the brakes? 20 N (a) 10 x10 J (c)-10 x10 J 14. A 7 kg ball is dropped from...
show all work will thumbs up
5, A certain tank has a circular bottom area A 25 m2. It is drained by a pipe whose linear resistance is R = The tank contains water whose mass density is 1000 kg/m 120 m.s a) How long will it take for the tank to empty if the water height was initially 16 m? b) Suppose we dump water into the tank at a rate of 0.1 m3/s. If the tank is initially...
Additional info:
Meal = 1720 Kilocalories
Mass of myself = 50 kg
The Joule () is the SI unit of energy. (J = kg:m? S2 A calorie is another unit of energy. The definition of a calorie is the amount of heat (energy) necessary to raise the temperature of Ig of water by 1° Celsius. Ig of water occupies 1 milliliter (ml) = 1 cubic centimeter (cm) of volume. lkcal=4186J Energy comes in many forms and energy may be converted...
Problem 7 The turbine rotor of ship of mass 6,000 kg has a radius of gyration 50 cm. It rotates at 1,820 rpm clockwise when looking from the stern (rear). Determine the effects set up of the following:- i. If the ship when traveling at 80 cm/h, steers to the left in a curve of 70 m radius. ii. If the ship is pitching and the bow is descending with the maximum velocity. The pitching is simple harmonic, periodic time...
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