Take this Quiz: A-Level Physics: Kinematics and Projectiles | Zestly

Question 1

A particle moves in a 2D plane with a velocity vector $\vec{v} = (3.0 \hat{i} + 4.0 \hat{j}) 	ext{ m/s}$. What is the magnitude of the velocity and the angle it makes with the positive x-axis?

Accepted Answer

$5.0 	ext{ m/s}$ at $53.1^\circ$

Question 2

A ball is thrown horizontally from a cliff at $15 	ext{ m/s}$. If it hits the ground $2.0 	ext{ s}$ later, which of the following statements are true? (Assume $g = 9.81 	ext{ m/s}^2$)

Accepted Answer

The horizontal distance traveled is $30 	ext{ m}$.

Question 3

Which of the following are scalar quantities?

Accepted Answer

Distance

Question 4

A projectile is launched at $30 	ext{ m/s}$ at an angle of $30^\circ$ to the horizontal. What is the vertical component of the initial velocity?

Answer

$26.0 	ext{ m/s}$

Answer

$21.2 	ext{ m/s}$

Answer

$15.0 	ext{ m/s}$

Answer

$10.0 	ext{ m/s}$

Question 5

On a velocity-time graph, what do the gradient and the area under the curve represent respectively?

Answer

Acceleration and displacement

Answer

Displacement and acceleration

Answer

Velocity and distance

Answer

Force and energy