Mechanics | Relativity Answers

A student in the lunchroom threw a 0.5 kg
burrito at a zombie. He accelerates the burrito
at 3 m/s2. How much force did he use?

How gravitational acceleration varies from poles to equator.

A jet airliner, moving initially at 300 Km/h to the east, suddenly enters a region where the wind is blowing at 100 Km/h toward the direction 30.00 north of east. What is the new speed and direction of the aircraft relative to the ground?

Your dog is running around the grass in your backyard. He undergoes successive displacements 3.50 m south, 8.20 m northeast, and 15.0 m west. What is the resultant displacement?

A girl delivering newspaper covers her route by traveling 3.00 blocks west, 4.00 blocks north, and then 6.00 blocks east. (a) What is her resultant displacement? (b) What is the total distance she travels?

A person walks 25.00 north of east for 3.10 km. How far would she have to walk due north and due east to arrive at the same location?

An electron of mass 9.11 x 10-31 kg has an initial speed of 3.00 x 105 m/s. It travels in a straight line, and its speed increases to 105 m/s in a distance of 5.00 cm. Assuming its acceleration is constant, determine the magnitude of the force exerted on the electron.

A passenger sitting in the back of a bus claims that she was injured when the driver slammed on the brakes, causing a suitcase to fly toward her from the front of the bus and hit her. If you were the judge in this case, what disposition would you make? Why?

An object of mass m moves with an acceleration a down a rough incline. Which of the following should NOT appear in a free-body diagram of the object and WHY? (a) the gravitational force exerted by the planet (b) ma in the direction of motion (c) the normal force exerted by the incline (d) the friction force exerted by the incline

If an object is in equilibrium, which of the following statements is not true? (a) The speed of the object remains constant. (b) The acceleration of the object is zero. (c) The net force acting on the object is zero. (d) The object must be at rest.