Which situation describes a system with decreasing gravitational potential energy?

An airplane is sitting on a runway waiting to take off. The airplane begins to move down the runway and it takes 10 s for the airplane to leave the ground. The speed of the airplane at takeoff is 40 m/s.

How fast is a 1.50 kg ball moving if it has a momentum of 4.50 kgm/s

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2. What is the mass of the car? A. 9.8 kg B. 1500kg C. 3000 kg D. 6000 kg

What energy transformation do batteries perform? A. stored electrical - -> kinetic - -> electrical B. chemical - -> electrical C. stored heat - -> electrical D. heat - -> mechanical - -> electrical

Which type of mechanical wave needs a source of energy to produce it? a. a transverse wave b. a longitudinal wave c. a surface wave d. all of the above

Suppose if you whirl a yo-yo about your head in a horizontal circle. in what direction must a force act on the yoyo? What exerts the force?

Solutions with a low pH have which of these properties? - have an - OH value -feels slippery -tastes sour -turns litmus paper blue

Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel? A. A compound B. An element C. A molecule D. An alloy

Consider two small masses of air, both at a pressure of 1000 mb. One mass is on the beach in Costa Rica (lucky air mass) and the other is on a glacier in Greenland (Sad!). Which mass has the higher density?

Metric Unit for Weight (Not grams)