Projectile Motion

• Motion with constant acceleration is known as Uniformly Accelerated Motion.
• When a ping pong ball is tossed and reaches its highest point, neither its velocity nor its acceleration is zero.
• When an object is hit vertically upward, the acceleration due to gravity is 0 at its highest point.
• An airplane accelerating at 3.20 m/s² for 32.80 s covers 1721.34 m before takeoff.
• Javier Sotomayor's high jump world record of 2.45 m had a takeoff speed of 6.92 m/s.

Projectile Motion

• A projectile achieves maximum range when fired at 45 degrees in the absence of air resistance.
• Momentum is directly proportional to mass and velocity i.e. larger and faster objects have greater momentum.
• A roller skate moving has greater momentum than a Mack truck at rest.
• Momentum refers to mass in motion.
• In a closed system, the total momentum remains constant, according to the law of conservation of momentum.
• Rebound is a special type of collision with a direction and speed change.
• Impulse is a fast-acting force or impact.
• The SI unit for impulse is kg m/s.
• Doubling a motorcycle's velocity doubles its momentum, which becomes 12000 units.
• A 30.00 kg mass falling from 4.00 m has a momentum of 265.63 kg m/s just before impact.
• The higher an object is from the ground, the greater its gravitational potential energy.
• The total momentum of a 6.00 kg ball moving at 6.00 m/s to the right and a 6.00 kg ball moving at 3.00 m/s to the left is 7.00 kg m/s to the right.
• Energy is converted from one form to another, in accordance with the law of conservation of energy.
• Kinetic energy is directly proportional to the square of speed.
• Convection is the main process of heat transfer in an air-conditioning unit.
• Headphones transform electrical energy into sound energy.
• In the street game sipa, the initial velocity of Jose has horizontal and vertical components with equal magnitude forming 45 degree angles with the horizontal.
• A ratan ball follows a parabolic path when kicked from a height.
• Speed is the rate of change of distance and is a scalar quantity.
• Velocity is the rate of change of displacement and is a vector quantity.
• Billy ran 2 laps around a 400-m track in 200 seconds with an average speed of 4 m/s.
• Jack's average velocity is 0 m/s , after running 2 laps around a 400-meter track in 200 seconds, as displacement is 0.
• A boy accelerating from rest to 10 m/s in 5 seconds has an average acceleration of 2 m/s².
• Distance is a scalar quantity that measures the total path travelled by an object.
• An object's momentum is affected by mass and velocity.
• Displacement is a vector quantity measuring how far an object has moved from its original position.
• The acceleration due to gravity has a constant value of -9.8 m/s².
• Projectile motion, is observed in some sports.
• A surfboard rolling at 4 m/s with a momentum of 8 kg-m/s has a mass of 2 kg.
• A tennis ball with a mass of 0.5 kg and momentum of 15 kg-m/s has a velocity of 30 m/s.
• Impulse is influenced by the amount of force and time.
• The third law of motion is how momentum is conserved wherein equal and opposite forces are exerted between two objects.
• Eggs break on roads due to shorter stopping time, but not on grass due to longer stopping time.
• A rollercoaster moving slowly at the top of a railway possesses both kinetic and potential energy.
• All power plants use steam to drive turbines to produce electricity except coal-fired plants.
• Chemical energy is a form of potential energy.
• The correct path of electrical power is: power plant → transmission substations → distribution substations → residences.
• Generators transform mechanical energy to electrical energy.
• A 3-kg book lifted 2.0 m acquires 58.88 J of potential energy with reference to the floor.
• A runner's potential energy at the highest point is equal to their kinetic energy at the lowest point, neglecting friction.
• A motorcycle going fast midway down a hill possesses both kinetic and potential energy.
• Projectile motion involves objects thrown or projected into the air subjected to the acceleration of gravity.
• An object with 25 J of kinetic energy and a mass of 34 kg is moving at 1.28m/s.
• Radiant energy is a form of kinetic energy.
• A wind-up toy that is fully wound and at rest possesses potential energy.
• Thermal energy is best described as the total kinetic energy in a closed system.
• Reducing electric bills can be achieved by switching off unused appliances.