v-u +at
0=15-10t
t= 15s (to max height)
therefore total time = 2 x 1.5=3s
Wilfykil answered the question on March 26, 2019 at 09:00
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Calculate the acceleration shown by the tickers-tape that was made using a ticker timer vibrating at 50HZ.
(Solved)
Calculate the acceleration shown by the tickers-tape that was made using a ticker timer vibrating at 50HZ.
Date posted:
March 26, 2019
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Answers (1)
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Sketch a velocity- time graph showing the motion of a ball vertically upwards with an initial velocity of u.
(Solved)
Sketch a velocity- time graph showing the motion of a ball vertically upwards with an initial velocity of u.
Date posted:
March 26, 2019
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Answers (1)
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The diagram below shows part of the motion of a tennis ball, which is projected vertically upwards from the ground and allowed to bounce on...
(Solved)
The diagram below shows part of the motion of a tennis ball, which is projected vertically upwards from the ground and allowed to bounce on the ground. Use this information to answer questions that follow.
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c) How high does the ball rise initially?
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Date posted:
March 26, 2019
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Answers (1)
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Water flows along a horizontal pipe of cross sectional area 30cm2. The speed of the water is 4m/s but it reaches 7.5m/s in a constriction...
(Solved)
Water flows along a horizontal pipe of cross sectional area 30cm2. The speed of the water is 4m/s but it reaches 7.5m/s in a constriction in the pipe. Calculate the area of the constriction.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows velocity time graphs for two objects A and B drawn on the same axes.
(Solved)
Figure below shows velocity time graphs for two objects A and B drawn on the same axes.
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Date posted:
March 26, 2019
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Answers (1)
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A pupil blows a current of air over the surface of a sheet of paper held close to its mouth. State and explain what happens...
(Solved)
A pupil blows a current of air over the surface of a sheet of paper held close to its mouth. State and explain what happens to the paper.
Date posted:
March 26, 2019
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Answers (1)
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The figure below shows water forces through a hydraulic system by a pump. An air chamber is used to maintain a continuous flow of water...
(Solved)
The figure below shows water forces through a hydraulic system by a pump. An air chamber is used to maintain a continuous flow of water during both the up-stroke and down-stroke of the piston pump.
Explain how the continuous flow of water is maintained.
Date posted:
March 26, 2019
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Answers (1)
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When spraying a field of water using a hose pipe, it is common to reduce the pipes opening in order to spray water furthest. Other...
(Solved)
When spraying a field of water using a hose pipe, it is common to reduce the pipes opening in order to spray water furthest. Other than pressure, what other quality is varied in the process?
Date posted:
March 26, 2019
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Answers (1)
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Sound is very faint in high altitudes than at sea level. Why?
(Solved)
Sound is very faint in high altitudes than at sea level. Why?
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows air molecules in front of a hollow wooden box P set vibrating by a tuning fork T of frequency 800Hz.
(Solved)
Figure below shows air molecules in front of a hollow wooden box P set vibrating by a tuning fork T of frequency 800Hz.
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(b) Name the section labeled X and Y
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Date posted:
March 26, 2019
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Answers (1)
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Figure below shows a thick copper plate that is very hot, one side is black and the other is shiny. Two thermometers are placed at...
(Solved)
Figure below shows a thick copper plate that is very hot, one side is black and the other is shiny. Two thermometers are placed at the same distance from each side as shown.
Neglecting heat loss to the surrounding, state with a reason which thermometer records a higher temperature after 10 minutes.
Date posted:
March 26, 2019
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Answers (1)
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When a sound wave travels from a dense to a less dense gas, its velocity changes. What wave property does this observation show?
(Solved)
When a sound wave travels from a dense to a less dense gas, its velocity changes. What wave property does this observation show?
Date posted:
March 26, 2019
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Answers (1)
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Best FM station broadcasts on a frequency of 250 KHz and the wavelength of its signals is 1200m.
(Solved)
Best FM station broadcasts on a frequency of 250 KHz and the wavelength of its signals is 1200m.
Calculate:
(i) The speed of radio waves in m/s
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Date posted:
March 26, 2019
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Answers (1)
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State ONE factor that does not change as water moves from shallow to deep part.
(Solved)
State ONE factor that does not change as water moves from shallow to deep part.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.
(Solved)
Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.
Determine the:
(i) Amplitude
(ii) Period
(iii) Wavelength
(iv) Frequency
Date posted:
March 26, 2019
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Answers (1)
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State THREE differences between light waves and sound waves.
(Solved)
State THREE differences between light waves and sound waves.
Date posted:
March 26, 2019
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Answers (1)
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A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from...
(Solved)
A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from the source.
Date posted:
March 26, 2019
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Answers (1)
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State one effect that would be observed when water waves pass from deep to shallow water.
(Solved)
State one effect that would be observed when water waves pass from deep to shallow water.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows the displacement – time graph for a certain wave
(Solved)
Figure below shows the displacement – time graph for a certain wave
Determine the frequency of the wave?
Date posted:
March 26, 2019
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Answers (1)
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Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.
(Solved)
Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.
Date posted:
March 26, 2019
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Answers (1)