What is the force exerted by a solid surface that opposes gravity?

Which item is an example of a primary source? A. An academic paper analyzing John F. Kennedy's presidency B. A transcript of a presidential speech C. A textbook about American foreign policy D.

Fingernails and muscles are made of proteins, which are polymers of

Two unknown charged particles are placed a distance of (4.0x10^0) m apart and experience a force of (6.400x10^0) N. If each charge is the same, what is the magnitude of each charge?

Which describes the path of a gas particle between collisions with other particles

A machine has a mechanical advantage of 4.5. What force is put out by the machine if the force applied to the machine is 800 N? 0.006 N 180 N 805 N 3600 N

A lorry with a mass of 5000kg accelerates to overtake a caravan on the motorway. Its acceleration is 1.5m/s². What force must the engine be providing? You can ignore the effects of friction and air resistance

Norma kicks a soccer ball with an initial velocity of 10.0 meters per second at an angle of 30.0% if the ball moves though the air for 3.2 seconds what's the horizontal distance traveled by the ball

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?