Math Problem Statement

A ball is projected vertically upward from the ground with an initial velocity of 30 m/s. Which of the following is closest to the maximum height reached by the ball?

Solution

To determine the maximum height reached by the ball, we can use the following kinematic equation that relates the initial velocity, final velocity, acceleration due to gravity, and displacement (height):

v2=u2+2asv^2 = u^2 + 2a s

Where:

  • vv is the final velocity at the maximum height (which is 0 m/s, since the ball momentarily stops before falling back down),
  • uu is the initial velocity (30 m/s),
  • aa is the acceleration due to gravity (-9.8 m/s², negative because it's acting downward),
  • ss is the maximum height (what we're solving for).

Let's plug in the values:

02=(30)2+2(9.8)(s)0^2 = (30)^2 + 2(-9.8)(s)

Solving for ss:

0=90019.6s0 = 900 - 19.6s 19.6s=90019.6s = 900 s=90019.645.92ms = \frac{900}{19.6} \approx 45.92 \, \text{m}

Thus, the closest value for the maximum height is approximately 46 meters.

Would you like more details or have any further questions?

Here are 5 related questions:

  1. What is the total time of flight for the ball?
  2. How long does it take the ball to reach the maximum height?
  3. What would the velocity of the ball be after 2 seconds of flight?
  4. If the ball is launched at an angle instead of vertically, how does that affect the maximum height?
  5. How does air resistance affect the motion of the ball?

Tip: When solving projectile motion problems, always pay attention to whether you are working with vertical or horizontal components of motion separately.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Kinematics
Projectile Motion
Newton's Laws of Motion

Formulas

v^2 = u^2 + 2as
v = final velocity
u = initial velocity
a = acceleration due to gravity
s = displacement or height

Theorems

Kinematic equations of motion
Conservation of mechanical energy (optional)

Suitable Grade Level

Grades 9-12