Midterm Review

Front

What is displacement in physics?

Back

Displacement is the vector quantity that represents the change in position of an object. It is the shortest distance from the initial to the final position, along with the direction.

Front

How do you calculate the resultant velocity of an object with two velocity components?

Back

To calculate the resultant velocity, use the Pythagorean theorem: Resultant Velocity = √(Vx² + Vy²), where Vx and Vy are the velocity components in the x and y directions.

Front

What happens to centripetal acceleration if the velocity of an object in circular motion doubles?

Back

If the velocity doubles, the centripetal acceleration increases by a factor of four, since centripetal acceleration is proportional to the square of the velocity (a_c = v²/r).

Front

What is the formula for calculating the resultant force when two forces act at right angles?

Back

The resultant force can be calculated using the Pythagorean theorem: Resultant Force = √(F1² + F2²), where F1 and F2 are the magnitudes of the two forces.

Front

What is the velocity of an object in free fall after 1 second?

Back

The velocity of an object in free fall after 1 second is approximately 9.8 m/s downward, due to the acceleration of gravity.

Front

Define velocity in physics.

Back

Velocity is a vector quantity that refers to the rate at which an object changes its position. It includes both speed and direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

How do you determine the direction of displacement?

Back

The direction of displacement is determined by the straight line drawn from the initial position to the final position of the object.

Front

What is the significance of the resultant force in physics?

Back

The resultant force determines the overall effect of multiple forces acting on an object, influencing its motion according to Newton's second law (F = ma).

Front

What is the formula for centripetal acceleration?

Back

Centripetal acceleration (a_c) is given by the formula: a_c = v²/r, where v is the velocity and r is the radius of the circular path.