Answer: The following statement is incorrect: The normal force always points upward (positive y-direction).
Explanation:
The normal force, as his names points out, is always normal to the surface on which the object that is being acted on by this force is placed.
This means that it will always be at straight angles with the surface, regardless of the orientation of the surface.
For instance, in an inclined plane, is directly related with the angle that the plane has with the horizontal, and can be even horizontal if the surface is a vertical wall.
The normal force is one of the components of the contact force (the other one is the fricition force, always parallel to the contact surface), and adopts any needed value to satisfy the Newton's 2nd Law.
Answer:
Speed = 300 m/s
Explanation:
Given the following data;
Frequency = 30 Hz
Wavelength = 10 m
To find the speed of the wave;
Mathematically, the speed of a wave is given by the formula:
Substituting into the formula, we have;
Speed = 300 m/s
Answer:
The moon's gravity pulls the Earth to make tides.
Explanation:
The Moons Gravity Pulls On The Earth With Different Strenght Making High Tide And Low Tide.
Hope This Helps!
The statement: Mass affects how fast an object falls is true.