Answer:
d) 4a
Explanation:
r = Distance
Electrostatic force is given by
It can be seen that the force is inversely proportional to distance
If the distance is reduced
So, the new acceleration will be four times the old acceleration
The answer is d) 4a
Answer:
Explanation:
Let assume that direction is positive when football travels to the player. The situation can be described properly by applying the definition of Momentum and Impulse Theorem. That is to say:
The average force needed to stop is obtained after some algebraic manipulations:
The impulse delivered to the ball is:
Linear Scientific Process
(last choice)
The speed increases from X to W because a component of the gravitational force acts in the direction of the velocity.
Answer:
Frequency.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.
Mathematically, the speed of a sound is given by the formula:
Speed = wavelength * frequency
The pitch of a sound you hear depends on the frequency of the sound wave.
