Physics, 27.02.2021 19:00, chelton3813
Horizontal force pulls a body of 2.25 kg a distance of 8 m across a rough horizontal surface, coefficient of friction 1/3. The body moves with constant velocity and the only resisting force is due to friction. Find the work done against friction. [2 marks]
Q2
The point A is 4 m vertically above the point B. A body of mass 0.2 kg is projected from A vertically downwards with speed 3 m/s. Find the speed of the body when it reaches B. [7 marks]
Q3
A body of mass 2 kg, passing through two points A and B. The speeds of the body as it passes A and B are 1 m/s and 4 m/s respectively. The resistance against which the body falls is 9.6 N. Use energy considerations to determine the distance AB. [5 marks]
Q4
A particle is projected horizontally with a velocity of 39.2 ms-2. Find the horizontal and vertical components of the velocity of the particle 3 seconds after projection. Find also the speed and direction of motion of the particle at this time. [6marks]
Answers: 2
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Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate
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Aviolently rotating column of air is formed around a region of extremely low air pressure above land. which of these weather conditions is most likely to follow? blizzard cyclone tornado hurricane
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Which of the following forces require physical contact? tension air resistance friction magnetic force applied force
Answers: 3
Horizontal force pulls a body of 2.25 kg a distance of 8 m across a rough horizontal surface, coeffi...
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