a projectile is launched with a velocity of 20m/s an angle 30 with respect to th

Question

a projectile is launched with a velocity of 20m/s an angle 30 with respect to the horizontal. when the project is at the maximum height choose the statement that best applies to this situation (assume no air resistance or wind)
A. The resultant force and the velocity directions are tangent to the trajectory. B. There is no net force acting on the projectile and the velocity direction is tangent to the trajectory. C. The resultant force and the velocity are perpendicular to each other. D. The resultant force and velocity act in the same direction. E. The resultant force and the velocity direction are parallel to the trajectory. a projectile is launched with a velocity of 20m/s an angle 30 with respect to the horizontal. when the project is at the maximum height choose the statement that best applies to this situation (assume no air resistance or wind)
A. The resultant force and the velocity directions are tangent to the trajectory. B. There is no net force acting on the projectile and the velocity direction is tangent to the trajectory. C. The resultant force and the velocity are perpendicular to each other. D. The resultant force and velocity act in the same direction. E. The resultant force and the velocity direction are parallel to the trajectory. a projectile is launched with a velocity of 20m/s an angle 30 with respect to the horizontal. when the project is at the maximum height choose the statement that best applies to this situation (assume no air resistance or wind)
A. The resultant force and the velocity directions are tangent to the trajectory. B. There is no net force acting on the projectile and the velocity direction is tangent to the trajectory. C. The resultant force and the velocity are perpendicular to each other. D. The resultant force and velocity act in the same direction. E. The resultant force and the velocity direction are parallel to the trajectory.

Explanation / Answer

Answer is The resultant force and the velocity are perpendicular to each other

Resulatnt force is act downward and is equal to weight(i.e.,mg)

Velocity at maximum height is along horizontal direction.and is equal to v cos 30 = 20 cos 30 = 17.32 m/s

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