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
Physics, 22.06.2019 19:00, sanchez626
Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe
Answers: 1
Physics, 22.06.2019 19:30, paigehixson342
Coal contains energy. a. light b. kinetic c. chemical d. mechanical
Answers: 1
Horizontal force pulls a body of 2.25 kg a distance of 8 m across a rough horizontal surface, coeffi...
Biology, 26.10.2020 22:50
Mathematics, 26.10.2020 22:50
English, 26.10.2020 22:50
Mathematics, 26.10.2020 22:50