Component of weight down the slope = 50 sin 30o = 25 N
Total force parallel down the slope = 29 + 25 = 54 N.
johnmulu answered the question on May 16, 2017 at 06:31
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Figure 13 shows a frictionless trolley of mass 2 kg moving with uniform velocity towards a wall. At the front of the trolley is a spring whose spring constant is 25 Nm-1. The trolley comes to rest momentarily after compressing after compressing the spring by 3 cm and the rebounds from the wall.
(i) Determine
(I) The force exerted on the wall by the spring.
(II) The maximum acceleration of the trolley as it rebounds from the wall.
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Date posted: May 16, 2017. Answers (1)
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Date posted: May 16, 2017. Answers (1)
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Date posted: May 16, 2017. Answers (1)
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Explain this observation.
Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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State the changes in the velocity of m between:
(a) B and C;
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Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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Describe the motion of the body during the 10 seconds
Date posted: May 15, 2017. Answers (1)
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Describe the motion of the body in the region;
(i) OA; (ii) AB; (iii) BC;
Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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Determine the distance the car travels in the first 40 seconds.
Date posted: May 15, 2017. Answers (1)
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Figure 5 shows air flowing through a pipe of different cross-sectional areas. Two pipes A and B are dipped into water.
Explain the cause of the difference in the levels of water in the pipes A and B.
Date posted: May 15, 2017. Answers (1)
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Explain how air is drawn into the burner when the gas tap is opened.
Date posted: May 15, 2017. Answers (1)
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State with a reason the part of the tube in which the pressure will be lowest when air is blown through the tube from A towards C.
Date posted: May 15, 2017. Answers (1)
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Figure 7 shows part of a petrol engine, in which air flowing under atmospheric pressure passes into a constriction, where it mixes with petrol. The mixture then flows into a combustion cylinder.
Explain what causes the petrol to move from the petrol chamber to the air steam in the constriction when the piston is moved downwards.
Date posted: May 15, 2017. Answers (1)
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Date posted: May 15, 2017. Answers (1)
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Figure 6 shows two inflated balloons hanging vertically on light threads.
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Date posted: May 15, 2017. Answers (1)