A person pushes a 14.0-kg lawn mower at constant speed with a force of

directed along the

N

0

.

88

F

handle, which is at an angle of 45.0 to the horizontal (Fig. 4-45). (

a

) Draw the free-body diagram

showing all forces acting on the mower. Calculate (

b

) the horizontal friction force on the mower, then

(

c

) the normal force exerted vertically upward on the mower by the ground. (

d

) What force must the

person exert on the lawn mower to accelerate it from rest to

in 2.5 seconds, assuming the

s

m

5

.

1

same friction force?