In a machine why is work output less than work input. friction is being converted into mechanical energy

thermal energy is being converted into friction

some energy is converted into thermal energy

thermal energy is being created by friction ​

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Aforce of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart?