Question

hahaha please answer my another question any 2 best answers please .......

Answer 1

A) $\mathfark{POSITIVE}$
REASON :
in the given case force and displacement are in the same direction
hence the sign of the work done is positive in this case the work is done on the bucket .

B) $\mathfark{NEGATIVE}$
REASON;
in the given case the direction of force (vertically downwards) and displacement (vertically upwards )are opposite to each other
hence the sign of the work done is negative

C) $\mathfark{NEGATIVE}$
REASON;
since the direction of frictional force is opposite to the direction of motion
the work done by frictional force is negative in this case

D)$\mathfark{POSITIVE}$
REASON:
hear the body is moving on a rough horizontal plane frictional force opposes the motion of the body therefore in order to maintain a uniform velocity or uniform force must be applied to the body since the applied force acts in
the direction of the motion of the body the work done is positive .

E) $\mathfark{NEGATIVE}$
REASON;
the resistive force of acting in the direction opposite to the direction of motion of the pendulum
hence the work done is negative in this case .

# be brainly

Answer 2

A)

REASON :

in the given case force and displacement are in the same direction

hence the sign of the work done is positive in this case the work is done on the bucket .

B)

REASON;

in the given case the direction of force (vertically downwards) and displacement (vertically upwards )are opposite to each other

hence the sign of the work done is negative

C)

REASON;

since the direction of frictional force is opposite to the direction of motion

the work done by frictional force is negative in this case

D)

REASON:

hear the body is moving on a rough horizontal plane frictional force opposes the motion of the body therefore in order to maintain a uniform velocity or uniform force must be applied to the body since the applied force acts in

the direction of the motion of the body the work done is positive .

E)

REASON;

the resistive force of acting in the direction opposite to the direction of motion of the pendulum

hence the work done is negative in this case .