Astudent throws a 0.160-kg ball straight upwards to a height of 4.70 m. how much work did the student do?

7.4 J

Explanation:

m = mass of the ball = 0.160 kg

h = height gained by the ball = 4.70 m

g = acceleration due to gravity = 9.8 m/s²

U = Potential energy gained by the ball

Potential energy gained by the ball is given as

U = mgh

W = work done by student

Using conservation of energy

W = U

W = mgh

W = (0.160) (9.8) (4.70)

W = 7.4 J

if you answer my question i will answer yours

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.