Aparticle is projected at an
angle of 45 degrees and a
velocity of 60 m/s, and taking
gravity 9.81 ms,
1. find the equation for the
particle for horizontal
displacement.
2. find the initial displacement
of the vertical motion.
3. find the equation for the
particle for vertical
displacement.
4. find the time taken to reach
the ground.
5. find the horizontal distance
that the particle travels.
6. find the maximum height of
the particle.
7.find the equation of the
trajectory.
8. find the height of the
particle when the horizontal
distance is 10 m.
9. find the horizontal distance
when the height of the
particle is 50 m.

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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.