Temperature is a measure of an object's a
average molecular kinetic energy

b
average molecular potential energy

c
flow of thermal energy

d
total molecular kinetic energy and molecular potential energy

f=ma newton

f=100x2.5=250n

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.