a > g , is the best shows the magnitude a and the direction of the ball's acceleration at time.
<h3>What is acceleration?</h3>
Acceleration is the rate at which the speed and direction of a moving object change over time. A point or object travelling in a straight path is accelerated if it accelerates or decelerates. Even if the speed is constant, motion on a circle is accelerated because the direction is always changing.
Given data
The velocity of the ball is: V
The angle of velocity with the horizontal is (θ) = 45
The acceleration of the ball is: a
The acceleration due to gravity is: g
When the hollow ball is projected into the air, air resistance will act on the ball that will slow down the ball's motion. Therefore the velocity direction is opposite to the reducing force. The reducing force relates to the opposite to the acceleration of the hollow ball.
F(delaying) ∝ -VF(delaying) ∝ m×a(r)×F(delaying) ∝ a(r)
Here m is the mass of the hollow ball.
The force of gravity on the ball which is acting downward given as:
F(gravity) ∝ g
So, a > g
Correct option: (B)
To know more about acceleration refer to:
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What is the unit c denotes here
Answer:
Explanation:
Using the equation of motion v = u + at to get the speed at which the object would be travelling.
v is the final speed (in m/s)
u is the initial velocity (in m/s)
a is the acceleration (in m/s²)
t is the time taken (in secs)
Given parameters
u = 0m/s
t = 10s
a = g = 9.8m/s²
Substituting this values into the formula;
v = 0+9.8(10)
v = 0+ 98
v = 98m/s
<em>Hence the rock will be travelling at a speed of 98m/s.</em>
Answer: The chemical formula for the compound of these two elements is 
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here metal lead is having an oxidation state of +4 called as 
cation and sulphur non metal has oxidation state of -2 called as 
. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral
The chemical formula for the compound of these two elements is
