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Majiri
Questions (15)
A ball shot at an angle of 60° to the ground strikes a building 23m away at a point 16m
high. Find the magnitude and direction
1 answer
1,825 views
If the house on a particular stretch of road are all the old numbers starting at 11, how many houses are there if the total all
1 answer
450 views
The speed limit in a school zone is 40km/h. A driver traveling at this speed sees a child run into the road 13m ahead of his
2 answers
5,572 views
A ball is thrown upward with speed 12m/s from the top of a building. How much later must a second ball be dropped. From the same
1 answer
1,848 views
A block and tackle system is used to lift a load of 20X through a vertical height of 10.5m. If the
efficiency of the system is
1 answer
449 views
The sum of three numbers in base two is 11101. If the first two numbers are 1011 and 1101 find the
third number?
1 answer
811 views
A radioactive sample initially contains N- atoms. After three half lives the number of atoms that
disintegrated is ?
1 answer
794 views
An object weighs 100N on the earth's surface. Find its weight at a point P with orbital radius 2R. [g =
10NKg-1
1 answer
1,936 views
An electric lamp has the following markings 230V. 250W, How long would it take the lamp to use one
kilowatt-hour when connected
2 answers
523 views
The unstretched length of a piece of elastic rubber is 5cm a force of 9N is required to stretch if by 1cm.what amount of work
2 answers
1,459 views
A jack has a lever arm of 45cm and pitch of 0.5cm. If it's efficiency is 30%,what force is required to lift a load W of mass
3 answers
1,018 views
What is the efficiency of a crane that used current of 8A at 150V to raise 450kg load at the rate of every minutes?
1 answer
419 views
What is the acceleration due to gravity 'g' on the moon if 'g' is 10m/s² on the earth?
2 answers
520 views
Calculate the length of a displaced pendulum Bob which pass through its lowest point twice every second. Take g=10m/s²
1 answer
2,021 views
How many moles of oxygen are produced when 20 moles decomposed?
1 answer
384 views
Answers (7)
No he is not. If you subtract two from the left hand side you get -4. So to solve the equation you add 2 to both sides
Using the formula a= (m2-m1)g/(m1+m2) a= -0.26 For tension T = (2m2m1)g/(m2+m1) =13.33N
x + y + z = 126.... equ 1 x = z/2 y = 3z/4 Put x,y into equ 1 z/2 + 3z/4 + z = 126 ( 2z + 3z + 4z )/4 = 126 9z/4 =126/1 z = 56 x = 56/2 = 28 Y = 3*56/4=3*14 = 42 56 + 28 + 42 = 126
Woww. Thanks
U=30m/s² V= 0 V = u -gt 0 = 30 - 10t t=3s
Thanks
Can you please drop the formula. Quite confuse.
