1.which car part tells the velocity of a car at a given time?
a.adometer
b.speedometer
c.accelerator
d.fuel gauge

2.which of the following pair is correct
a.distance:meter
b.displacement:second
c.speed:meter per second
d.acceleration:kilometer per hour.

3.ten second after staring from rest a car moves at 40m/s. what is the cars acceleration?
a.2.5m/s
b.4.0 m/s
c.10m/s
d.40 m/s

4.whice of the following is the highest frequency?
a.2kHz
b.1kHz
c.10kHz
d.2000kHz

5.which of the following is an example of a mechanical wave?
a.x-ray
b.macrowave
c.sound wave
d.visible light.​