Of the seven chambers in the masque of the red death, which room is the least popular, and why?
a. the white room; because it is too plain.
b. the orange room; because it is too bright.
c. the violet room; because it is too cold.
d. the black room; because it is too frightening

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.