A meteoroid is moving towards a planet. It has mass m = 0.82×109 kg and speed v1 = 5.6×107 m/s at distance R1 = 1.1×107 m from the center of the planet. The radius of the planet is R = 0.78×107 m. The mass of the planet is M = 5.2×1025 kg. There is no air around the planet. show answer Correct Answer 14% Part (a) Enter an expression for the gravitational potential energy PE1 of the meteoroid at R1 in terms of defined quantities and the gravitational constant G. Assume the potential energy is zero at infinity. PE1 = ( - G M m )/R1 ✔ Correct!show answer Correct Answer 14% Part (b) Calculate the value of PE1, in joules. PE1 = - 2.587 * 10( 17 )PE1 = -2.587E+17 ✔ Correct!show answer No Attempt 14% Part (c) Enter an expression for the total energy E1 of the meteoroid at R1 in terms of defined quantities.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

object 2 because all the other ones are wrong

c. newton's third law of motion

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.