Physics Midterm Review 1

Front

What happens to the magnitude of the acceleration and the speed of a rock dropped from a bridge as it falls?

Back

Acceleration remains the same and speed increases.

Front

What is a vector?

Back

A vector is a quantity that has both magnitude and direction.

Front

What must a cart undergo as it travels around a horizontal circular track?

Back

The cart must undergo a change in velocity.

Front

If 0.00075 is expressed in the form of 6.3x10^n, what is the value of n?

Back

n = -4.

Front

What is the length of the other leg of a right triangle if the hypotenuse is 20 cm and one leg is 12 cm?

Back

The length of the other leg is 16 cm.

Front

Define acceleration.

Back

Acceleration is the rate of change of velocity of an object with respect to time.

Front

What is the formula for calculating the force acting on an object?

Back

Force (F) = mass (m) × acceleration (a), or F = ma.

Front

What is the principle of conservation of energy?

Back

The total energy in a closed system remains constant; energy can neither be created nor destroyed.

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

What is Newton's second law of motion?

Back

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).