Subject :NSO Class : Class 5
Refer to the given figure indicating three types of forces, X, Y and Z and select the incorrect option.
AAn astronaut floats in space due to absence of
force Z.
BWhen we use pulley to lift a bucket of water from
well (pulling vertically downward) then pulley
makes X in opposite direction of Z making it
easier to lift the bucket.
CForce Y is responsible for wearing and tearing
of tyres of vehicles.
DWe can walk only on those surfaces which offer
no Y.
Ans 1:
Class : Class 5
its both b and d