What will cause a backpack sitting on the floor of the school bus to suddenly fly forward

According to the kinetic theory of gases, the kinetic energy of molecules is proportional to which factor? A. Concentration in moles/liters B. temperature in kelvin

You have a mass of 60-kg, and you are facing your friend who has a mass of 100 kg. You skate towards each other fast, and after you collide you both come perfectly to rest.

Protons are the smallest particle of an element that retains the original Characteristics of the element. True or False

If you placed a cylinder with a 0.25 m radius in the middle of a record player that spins at 4.7 rad/s, what is its angular momentum? The cylinder has a mass of 2.0 kg.

PART ONE: An amusement park ride consists of a rotating circular platform 8.78 m in diameter from which 10 kg seats are suspended at the end of 3.54 m massless chains. When the system rotates, the chains make an angle of 40.7◦ with the vertical.

Two lab carts are pushed together with a spring mechanism compressed between them. Upon release, the 5.0 kg cart repels one way with a velocity of 0.12 m/s. The 2.0 kg cart goes the other way. At what velocity does it travel?

A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?

an electric clothes dryer has a resictance of 16 Ohms it drawes 15 A of current what is the voltage in volts of the wall outlet that it is pluged into

A lorry with a mass of 5000kg accelerates to overtake a caravan on the motorway. Its acceleration is 1.5m/s². What force must the engine be providing? You can ignore the effects of friction and air resistance

Norma kicks a soccer ball with an initial velocity of 10.0 meters per second at an angle of 30.0% if the ball moves though the air for 3.2 seconds what's the horizontal distance traveled by the ball