Acceleration Free Fall MCQ with Answers PDF Download – Test 96

If a feather and an iron bar is released from a same height in a room without any air resistance. The first one to fall is

1. Iron bar
2. Feather
3. Both at the same time
4. They won?t fall

Vacuum in a vacuum flask prevents heat transfer through process of

1. Conduction only
2. Convection only
3. Conduction and Convection
4. Radiation only

With reference to the equation of W = F.s, where 'W' is work done, 'F' is force and 's' is displacement, we can conclude that 1 Joule is equal to

1. 1 N m^-1, where N is Newton and m is meter
2. 1 N m, where N is Newtons and m is meter
3. 1 W m, where W is watts and m is meter
4. 1 W m^-1, where W is watt and m is meter

Sound can be transmitted through a medium which

1. contains charge
2. has higher density than air
3. contains molecules that vibrate
4. contains molecules that collide

The higher the temperature the vibration of particles would be

1. softer
2. vigorous
3. normal
4. may get vigorous or may become softer