Answer:
(a). The mass of the block of ice is 62.8 kg.
(b). The distance is 24.192 m.
Explanation:
Given that,
Horizontal force = 80.5 N
Distance = 13.0 m
Time = 4.50 s
(a). We need to calculate the acceleration of the block of ice
Using equation of motion

Put the value into the formula



We need to calculate the mass of the block of ice
Using formula of force


Put the value into the formula


(b). If the worker stops pushing at the end of 4.50 s,
We need to calculate the velocity
Using equation of motion

Put the value into the formula


We need to calculate the distance
Using formula of distance


Put the value into the formula


Hence, (a). The mass of the block of ice is 62.8 kg.
(b). The distance is 24.192 m.