A marble is projected from a card stock catapult at a point 18 cm above the floor. If the marble is given an initial velocity of 8 m/s at an angle of 50° find (a) the time to the maximum height of the marble.
(b) the maximum height of the marble.
(c) the total time the marble is in the air graphically.
(d) the range of the marble.
(e) the final speed when the marble strikes the ground.

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Simple machines can a. increase force only b. decrease force only c. increase or decrease force