Why do astronauts appear weightless despite being near the Earth?
What would fall faster on the moon, a brick or a feather?
Figuring out the acceleration of ice down a plane made of ice.
Explore the various forces acting on a block sitting on an inclined plane. Learn how to break the force of gravity into two components - one perpendicular to the ramp and one parallel to the ramp. Finally, using geometry and trigonometry, learn how to calculate the magnitude of each component of force that is acting on the block.
You want a projectile to fly as far as possible, at which angle should you launch it? We'll start with formulas for the initial velocity.
Figuring out the horizontal displacement for a projectile launched at an angle.
How to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. We also explain common mistakes people make when doing horizontally launched projectile problems.
Visualising position, velocity and acceleration in two-dimensions for projectile motion.
Visualising, adding and breaking down vectors in 2 dimensions.
Defining and comparing tension, weight, friction and normal forces using free body diagrams.