What happens if an object has a negative acceleration?
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. And if the acceleration points in the opposite direction of the velocity, the object will be slowing down.
What is the equation for final velocity?
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth’s gravitational force as the acceleration rate of an object.
What is initial velocity equal to?
Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts.
What is G in projectile motion?
We can obtain the equations for projectile motion by plugging the appropriate accelerations into the two-dimensional motion equations: g = 9.8m/s2 = 32ft/s2 at the surface of the Earth. The minus sign appearing in the equations indicates that the y-axis must point upwards, or opposite the direction of gravity.
At what part of a path does a projectile have minimum speed?
A projectile have a minimum speed at the highest point of its trajectory. This is because horizontal speed of the projectile remains constant. Since the only force exerted on the projectile is gravity, which is 9.8 ms2 acting downwards and has no effects on the horizontal velocity.
Is G positive in projectile motion?
So remember, g is positive if the motion of the object has the same direction as the direction of the gravitational acceleration vector, →g , and negative if it has the opposite direction.
Is acceleration due to gravity negative or positive?
The acceleration due to gravity is ALWAYS negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of -9.81 m/s2, regardless of the direction. The acceleration is negative when going up because the speed is decreasing.
Does mass affect a projectile?
Explanation: Mass is not relevant in projectile motion. What is relevant is the initial speed and direction of the object.