A motorcycle traveling at 36 m/s slams on the brakes to avoid an accident. The motorcycle skids 23m before stoping. What is the

Answer:

D. Is Zero

Explanation:

The acceleration experienced by projectiles moving through the atmosphere solely results from gravity, which measures 9.81 m/s².

Apart from gravity, there is no other factor causing acceleration. Air resistance only affects projectiles differently based on their surface areas, leading to varied rates of slowing.

As friction isn't accounted for here (no details about projectile surface areas are provided), we do not need to factor it in, hence ONLY GRAVITY COUNTS.

Both objects are influenced equally by gravity, resulting in no relative acceleration between them.

At great distances from the planet, if neglecting other gravitational influences, the rock will reach a speed close to

Explanation:

To express the velocity that is very far from the planet alongside the escape velocity, we utilize the principles of energy conservation, allowing us to derive

The initial velocity of the rock, . Given that the radius is R, we can determine the escape velocity using the following formula:

Where M represents the mass of the planet and G represents the gravitational constant.

Based on the given conditions,

Surface potential energy can be articulated as,  

As R approaches infinity when distanced from the planet, thus

Then, the initialkinetic energy will be expressed as

Simultaneously, the finalkinetic energy can be described as

Here,

Now, adding the potential and kinetic energies at the beginning and end gives the equation to determine the final velocity

By canceling 'm' common on both sides, we yield

Recognizing that , we can rewrite it as , we arrive at

Taking the squares out leads to