1 mile = 5280 ft
1 hour = 3600 seconds
→ 1 mph = 1 mile/1 hour
= 5280 ft/3600 seconds
= 22/15 ft/s
v = u + at
→ a = (v - u) ÷ t
= (90 mph - 0 mph) ÷ 0.5 s
= (90 x 22/15 ft/s) ÷ 0.5 s
= 264 ft/s2
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Answer #2:
180 miles/hour-second
(Exactly the same number as Answer #1.)
After, and at the exact moment, the ball leaves the hand it is only accelerated by gravity if you disregard air resistance.
The only force acting on a projectile once launched is gravity. So the acceleration of any object launched at any angle is the acceleration due to gravity, -9.8m/s2.
no because the higher it gets the speed increases and its do not does.
No. A nonzero acceleration means that the velocity is changing, so it can only have a 0 velocity at a single point in time, such as when a ball thrown in the air reaches its peak.
Yes, and the classic example that all mathematics students study is the motion of a projectile. Typically a ball is thrown (or a cannonball fired) at an angle to the horizon and pupils study its trajectory. With some simplifying assumptions, the trajectory is a parabola. Ignoring air resistance (a simplifying assumption), the only acceleration is due to the downward acting force of gravity.
If the object is thrown upwards, the vertical acceleration is negative and the horizontal acceleration is zero.
After being released, a ball thrown straight down from a bridge would have an acceleration of
the less mass the ball has (times) the acceleration the ball is moving = the force the ball was thrown at.(F=MA)
No, the acceleration at the highest point is never 0.
positive
Acceleration is dependent on the initial velocity of how fast the object is leaving the projectile. The vertical acceleration is greater when the object is falling than when the object reaches the peak in height. However, if the object is thrown horizontally and there is no parabola in its shape then there is not as great of an acceleration.
Acceleration is change of speed / time, so in this case you have 90 miles per hour per second. While this is a valid unit of acceleration (a unit of distance divided by two time units), you may want to convert this to other units. Reminder: 1 hour = 3600 second; and 1 mile = 5280 feet.
zero
A baseball can
The acceleration is the acceleration of gravity, downwards, or 9.8m/s/s (32 ft/s/s). When ball is thrown straight up it has an initial velocity that is decreasing because of gravity; at the highest point velocity is zero but acceleration is always constant at gravity rate.
It is the same (neglecting air resistance).
0 zero