Projectile motion

The diagram shows the path of a projectile that is launched with velocity v. Air resistance is negligible. A second projectile has double the mass of the first projectile and is launched with the same velocity. Air resistance is still negligible. Which of the following paths best represents the path of the projectile? (The original path is shown as a dotted line)

Two cars, X and Y, are travelling towards a junction. The velocity of car X is VX and car Y is VY. Which of the following vectors represent the velocity of Y relative to X?

A projectile is fired at an angle to the horizontal. The path of the projectile is shown. The magnitude of the horizontal component of the projectile between O and P will [[1]] and the magnitude of the vertical component of the velocity will [[2]]. A wrong idea would be to assume that either of these components would [[3]].

*This is an HL question

A projectile is launched at an angle above the horizontal with a horizontal component of velocity V

h

 and a vertical component of velocity V

v

. Air resistance is negligible. Which graphs show the variation with time of V

h

 and of V

v

?

* This is an HL question

A ball is tossed vertically upwards with a speed of 5.0 m/s. After how many seconds will the ball return to its initial position?

A projectile is fired horizontally from the top of a cliff. The projectile hits the ground 4 s later at a distance of 2 km from the base of the cliff. What is the height of the cliff?