Question

3 multiple answer 1 point a ball is thrown upwards at an angle of 45 degrees from the horizontal by a student. while it flies through the air, what is true of the balls acceleration? select all true statements. the acceleration in the y direction is -9.8 m/s² the acceleration in the x direction is 0 m/s² the acceleration in the x direction is -9.8 m/s² the acceleration in the y direction is 0 m/s²

Explanation:

Step1: Analyze y - direction acceleration

In projectile motion near the Earth's surface, the only force acting on the ball in the vertical (y - direction) is the gravitational force. The acceleration due to gravity $g = 9.8\ m/s^{2}$ acts downwards. So the acceleration in the y - direction $a_y=-g=- 9.8\ m/s^{2}$.

Step2: Analyze x - direction acceleration

There is no horizontal force acting on the ball (neglecting air - resistance). According to Newton's second law $F = ma$, if $F_x = 0$, then $a_x=0\ m/s^{2}$.

Answer:

The acceleration in the y direction is -9.8 m/s², The acceleration in the x direction is 0 m/s²