The force of friction between two surfaces will increase if:
A). A layer of lubricant is kept between the two surfaces
B). The two surfaces are pressed harder
C). Air gap is created between the two surfaces
D). Irregularities on both the surfaces are removed
The two surfaces are pressed harder
The friction between two surfaces can be increased if the surfaces are pressed into each other with greater force. The harder the brakes are pushed, the harder the pads get pressed into the discs and the more friction is generated.
1. The scientist who first sent electromagnetic waves to distant places is
2. Friction is caused by the ______________ on the two surfaces in contact.
4. What is the net charge on Calcium fluoride?
5. The velocity of sound is more of
6. Pycnometer is an instrument used to measure the
7. Which compressor is usually used in AC?
8. Which of the following is indicated by the colour of a star ?
9. Which one of the following animals can hear ultrasonic sound ?