A baseball has a mass of 145 g. A pitcher throws the baseball so that it accelerates at a rate of 80 m/s2. How much force did the pitcher apply to the baseball
We can use the formula:
force = mass x acceleration
Plugging in the given values, we get:
force = 0.145 kg x 80 m/s^2
force = 11.6 N
Therefore, the pitcher applied a force of 11.6 N to the baseball.
Which situation describes a negative acceleration
A negative acceleration occurs when an object is slowing down. In other words, its velocity is decreasing over time. Here are some situations that describe negative acceleration:
1. A car is driving forward and suddenly brakes, causing its speed to decrease rapidly. The car is experiencing a negative acceleration.
2. A ball is thrown straight up in the air, but starts to slow down as it reaches the top of its trajectory before falling back down. At this moment, the ball is experiencing a negative acceleration.
3. A roller coaster is at the top of a loop and starts to slow down as it starts to descend. The roller coaster is experiencing a negative acceleration at this moment.
To find the force applied by the pitcher on the baseball, we can use Newton's second law of motion, which states that force (F) is equal to the mass (m) multiplied by the acceleration (a).
The given mass of the baseball is 145 g, which is equivalent to 0.145 kg (since 1 kg = 1000 g).
The given acceleration is 80 m/s^2.
Now, we can plug these values into the formula:
F = m * a
F = 0.145 kg * 80 m/s^2
F = 11.6 N
Therefore, the pitcher applied a force of 11.6 Newtons to the baseball.