Why is 45 degrees the best angle to throw?
A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees. That means that the best way to launch a high-altitude projectile is to send it flying at a 90-degree angle to the ground—straight up.
How do you calculate the distance a projectile will travel?
The equation for the distance traveled by a projectile being affected by gravity is sin(2θ)v2/g, where θ is the angle, v is the initial velocity and g is acceleration due to gravity. Assuming that v2/g is constant, the greatest distance will be when sin(2θ) is at its maximum, which is when 2θ = 90 degrees.
What is the speed of a projectile at its maximum height?
When a projectile reaches maximum height, the vertical component of its velocity is momentarily zero (vy = 0 m/s).
How long does it take the ball to reach its maximum height?
3.058 s
Is 12 m sa realistic speed for an object that you can throw with your hands?
And yes the human hand can throw the ball at an initial velocity of 12 m/s.
When a ball is thrown vertically upwards?
An object that is thrown vertically upwards decelerates under the earth’s gravity. Its speed decreases until it attains a maximum height, where the velocity is zero. Then it is accelerated uniformly downwards under gravity.
When a ball is thrown vertically upwards it goes through a distance of 19.6 m?
Thus ,the intial velocity of the ball is 19.6 m/s which means that the ball has been thrown upwards with a velocity of 19.6 m/s . Thus the ball takes 2 seconds to reach the highest point of the ground . In other words ,the ball will take a total of 2+2=4 second to reach back to the thrower.
When a ball is thrown vertically upwards then at the highest point?
When a body is thrown vertically upwards, at the highest point only velocity is zero because the acceleration due to gravitational force is acting downward continuously and that is the reason for velocity being zero at the highest point, hence velocity is zero because of the acceleration.
What happens when you throw a ball upwards?
When we throw a ball upwards, its speed retards gradually. This is because the earth produces a gravitational force which brings down everything that goes up. So when a ball is thrown upward the gravity applies force to bring it down which decreases its speed of going up.
Why a ball thrown up comes down?
This is because the force of earth’s gravitational field is always directed downwards (towards the center of the earth. When the ball is thrown up, it is going against the earth’s gravitational field and so, the earth’s gravitational force pulls it back down, accelerating it downwards.
What can forces do a woman throwing a ball?
Girl throwing a ball: When the girl throws the ball, she is applying a force to it and accelerating it. As soon as she lets go, gravity, which also applies a force, accelerates the ball downward.
Is upward acceleration positive or negative?
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.
What is the direction of acceleration due to gravity class 9?
Acceleration due to gravity (g=9. 8 m/s2) always acts in the downward direction.
Where is acceleration due to gravity is maximum?
The value of acceleration due to gravity is maximum at poles and minimum at equator. why ? The value of acceleration due to gravity is maximum at poles and minimum at equator.
What is direction of acceleration due to gravity?
Acceleration Due to Gravity. In physics, a uniformly accelerated motion in a vertical line is called free fall. Every object on the earth experiences a common force: the force due to gravity. This force is always directed toward the center of the earth (downward).
Is G negative or positive?
g always acts downwards and is a positive number 9.8 m/s². It can be negative or positive depending upon the sign you assign to upward and downward directions. g is a number, like 5.6 or pi. There is no “positive or negative” version of g.
Is acceleration due to gravity constant?
The acceleration due to gravity, usually written as g, is a measure of how fast a free-falling object will accelerate when dropped near the surface of the Earth. It is more or less constant everywhere on Earth.
How is 9.81 calculated?
In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2. The acceleration g=F/m1 due to gravity on the Earth can be calculated by substituting the mass and radii of the Earth into the above equation and hence g= 9.81 m s-2. …
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.