A person is running on a track. Which of the following forces propels the runner forward?

A girl on the swing throws a ball at the velocity of positive + 7.5 m/s relative to the swing. When the ball leaves her hand, the girl has a velocity of + 13.5 m/s relative to the ground.

Baby Boomers are likely to require psychological care from which type of medical specialist? A - Geriatric Psychologist B-Child Psychologist C-Social Psychologist D-Physician

A 1200 Kg car travels at constant speed of 32 m/s/s. If the coefficient of friction between the road and the tires is 0.45 what force is applied by the car engine to run it?

Why the shape of the earth is spherical

Identify the machines in which both a lever and a wedge are used

A skydiver with a mass of 60 kg jumps from an airplane. Five seconds after jumping the force of air resistance is 300 N. What is the acceleration of the sky diver, five seconds after jumping?

How many basic wave forms are there? A.) 1 B.) 2 C.) 3 D.) 4

How much power is reqired to lift a 10-n box 2 meters

Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. A 200 kg dolphin leaps straight up to a height of 7.8 m.

An example of renewable energy resource is ... A - uranium B - Wind C - natural gas