If you are cycling, and wind pushes you from behind, your speed will __________ .
Increase
Decrease
Not change
None of these
The unit of pressure is __________ .
Newton
Hertz
Pascal
Kelvin
In the following statement in which case work is to be done
A man is carrying a weight and stands still
A crow is sitting on a cow
A man climbs a stair case with the weight
A woman sitting on a chair
