help please?

Question

under what circumstances can an object moving with aconstant speed(uniform magnitude of its velocity), still have acceleration?

second question:tell in what two basic ways the velocity of an object can change to produce an acceleration.

3rd:what change in motion is produced on a freely-falling object near Earth's surface by the acceleration due to gravity?

4th:describe the path followed by an object such as a baseball that is initially thrown horizontally near Earth's surface.(does it travel in a straight line?)

Answer 1

1. When the object changes it direction or moving in a curvature path.

2. increase the velocity or decrease the velocity.

3. This question is not so clear to me.

4. It will follow a path of a half parabola.

Answer 2

1) If the object maintains the same speed but changes its direction (goes around a curve) it will technically be accelerating because the change in direction means a change in velocity.

2) If the velocity increases or decreases there will be acceleration. An increase in velocity gives positive acceleration and a decrease in velocity gives negative acceleration (deceleration).

3) The change in motion is to accelerate toward the center of the Earth. As objects fall they accelerate at a rate of 9.80 m/s^2 toward the Earth.

4) The object will take a curved path known as projectile motion due to the initial horizontal force and the force of gravity in the vertical direction. The path with be curved.