The distance from (a) to (b) is 20 cm, the distance (a) to (c) is 80 cm, the mass at (b) is 1kg. What mass would have the block at (c)?
400 gm
250 gm
1000 gm
600 gm
How much effort is required for lifting a load of 1000 N with the help of wheel and axle when the radius of the wheel is 50cm and that of the axle is 10cm ?
600 N
5000 N
500 N
200 N
What are the two variables that determine the mechanical advantage of a simple machine?
Speed,Force
Force, Distance
Acceleration, Power
Power, Distance
You need to lift a piano to the third floor. Which simple machine would not work?
Pulley
Lever
Inclined plane
Wedge
Find the mechanical advantage of the screw jack having a pitch of 34.0mm and a handle radius of 52.0 cm
960
0.411
96 .0
411
The number of simple machines hitherto identified by the scientists is
6
7
5
10
Pick out the instrument which uses gears from the following .
Scissors
Screw driver
Forceps
Hand-drill
The ratio of the work output to the work input is
Mechanical advantage
Efficiency
Work
Power
If the mechanical advantage of a simple machine is 4, then the
Effort is 4 times the output force
Output is 4 times the effort
Efficiency is 4%
The work output is 4 times the input
Simple machine.
Tool that gives electricity to other machines.
A machine that does only one job.
Any tool that makes work easier.
A machine that is made up of many smaller parts.
