2nd Quarter Physics Midterm Review pt.2

Front

What is impulse in physics?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force and the time duration over which the force acts.

Front

How is impulse related to momentum?

Back

Impulse is equal to the change in momentum of an object. Mathematically, Impulse = Δp = p_final - p_initial.

Front

What is the formula for calculating impulse?

Back

Impulse (J) = Force (F) × Time (t) or J = Δp.

Front

What is the gravitational constant (G)?

Back

The gravitational constant (G) is a fundamental physical constant used in the calculation of gravitational forces between two bodies. Its value is approximately 6.67 x 10^-11 N(m/kg)^2.

Front

What is the significance of a negative impulse?

Back

A negative impulse indicates that the force applied to an object is in the opposite direction of its motion, resulting in a decrease in momentum.

Front

How do you calculate the final momentum of an object?

Back

Final momentum (p_f) can be calculated using the formula: p_f = p_i + J, where p_i is the initial momentum and J is the impulse.

Front

What is the relationship between mass, velocity, and momentum?

Back

Momentum (p) is the product of an object's mass (m) and its velocity (v). Mathematically, p = m × v.

Front

What happens to the momentum of an object if no external forces act on it?

Back

If no external forces act on an object, its momentum remains constant, according to the law of conservation of momentum.

Front

What is the unit of impulse?

Back

The unit of impulse is Newton-seconds (N·s) or kg·m/s.

Front

How do you determine if a calculated impulse is correct?

Back

To determine if a calculated impulse is correct, check if it aligns with the change in momentum (Δp) of the object based on its initial and final velocities.