does anyone have the answers to Physical Science B Semester Exam? A gardener uses a wheelbarrow to move 20 kilograms of soil from a compost pile to a flower bed, a distance of 53 meters. The wheelbarrow has a mass of 17
kilograms. He expends 94.5
Newtons of force. How much work does the gardener do? (1 point)
O 1,961 N
O 5,008.5 N
• 3,496.5 N
O 135.4 N A mechanic wants to use a compound pulley to lift a go-kart from the ground to work table, a distance of 1.2 meters. Without the pulley, 1,620 Newtons of force would be needed to lift the go-kart.
If the pulley has a mechanical advantage of 4, how much force must the mechanic expend?
(1 point)
O 1,350 N
O 405 N
O 1,616 N
O 5,400 N What is the advantage of class 3 lever? (1 point)
It increases the mechanical
O advantage compared with
other levers.
It decreases the amount of
O force that needs to be
applied.
O lt decreases the amount of
work that needs to be done.
It decreases the distance
• over which force needs to be applied.
i need all 30 questions someone please help me if u have the answers to the exam