Pick out the instrument which uses gears from the following .
Scissors
Screw driver
Forceps
Hand-drill
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.
You need to lift a piano to the third floor. Which simple machine would not work?
Pulley
Lever
Inclined plane
Wedge
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
The mechanical advantage of an oar is 3.00. If the resistance force of the water is 35.0 N,what is the effort force exerted by the rower?
0.0857 N
11.7 N
105 N
32.0 N
Which of the following is not considered as a simple machine?
Wheel barrow
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
An automotive engineer realizes it will be difficult for drivers to turn a pick up truck with a steering wheel that has a radius of only 11.0 cm . What can the engineer do to increase the mechanical advantage of the steering wheel?
Shorten the axle length of the steering wheel
Decrease the radius of the steering wheel
Lengthen the axle length of steering wheel
Increase the radius of the steering wheel
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
The number of simple machines hitherto identified by the scientists is
6
7
5
10
