Physics Quiz: Knowledge of the Universe – Play to Win Starbucks Gift Card

This famous equation by Albert Einstein shows that energy (E) and mass (m) are interchangeable, with c² being the speed of light squared.

The Sun provides most of the energy that powers Earth’s climate, ecosystems, and life processes through solar radiation.

The acceleration due to gravity near Earth’s surface is approximately 9.8 m/s². This value is constant and affects all objects in free fall.

Newton’s First Law (the law of inertia) states that an object in motion stays in motion unless acted upon by an external force. Seat belts help stop the body’s motion during a sudden stop, preventing injury.

The unit of force is the Newton (N), named after Sir Isaac Newton. It is defined as the force required to accelerate a 1 kg mass by 1 m/s².