Question

An object is thrown up into the air with an initial velocity of 40 m/s. Neglect air friction.

a. How long does it take to reach the high point?

Option A: 2 seconds
Option B: 4 seconds
Option C: 6 seconds
Option D: 8 seconds

Answer 1

The time it takes for the object to reach the maximum height is 4 seconds.

Step-by-step explanation:

The time it takes for the object to reach the maximum height can be calculated using the equation:

time = (final velocity - initial velocity) / acceleration

In this case, the initial velocity is 40 m/s and the acceleration due to gravity is -9.8 m/s^2 (negative sign because the object is moving upwards against gravity).

Substituting the values into the equation, we get:

time = (0 - 40) / -9.8 = 4 seconds

Therefore, the correct answer is Option B: 4 seconds.