A hiker walks 3.79 m, N and 3.80 m, E. What is the magnitude of his resultant displacement?

5.37

Explanation:

using Pythagoras theorem

X²=3.79²+3.80²

X²=14.3641+14.44

X²=28.8041

X=√28.8041

X=5.3669

X=5.37m N.E to 2d.p

it would be kevlar ^^

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.