Mechanics | Relativity Answers

A 6.0-kg object is pulled along a frictionless horizontal surface by a horizontal force of 24 N. If the object is at rest at t = 0 , how fast is it moving after 3.0 seconds (in m/s)?

A position-time graph for a particle moving along the x axis is shown in the figure. The divisions along the horizontal axis represent 0.75 s and the divisions along the vertical axis represent 3.0 m. Find the average velocity in the time interval t = 2.25 s to t = 6.00 s. Determine the instantaneous velocity at t = 3.00 s (where the tangent line touches the curve) by measuring the slope of the tangent line shown in the graph. At what value of t is the velocity zero?

A rotten tomato is thrown with an initial velocity of 15 m/s at an angle of 45. Where on stage does it land?

A car is traveling with a constant speed when the driver suddenly applies the brakes, giving the car a deceleration of 3.50 m/s2. If the car comes to a stop in a distance of 30.0 m, what was the car's original speed?

A cessna aircraft has a lift-off speed of 120km/h. (a) what minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 240 m? (b) how long does it take the aircraft to become airborne?

show that when a particle is moving in a SHM,its velocity at a distance of sqrt of 3/2A from the central position is half of its velocity in the central position

A school bus takes 0.36 h to reach the school from your house. If the average velocity of the bus is 18 km/h to the east, what is the displacement?

A baseball is thrown horizontally from a height of 122.5 m above the ground with a speed of 26.5 m/s. Where is the ball after 5.00 s has elapsed?




horizontal



m from the launch position



vertical



m from the ground

a bullet of mass 20g fired from a gun of mass 5kg gives a recoil velocity of 0.2ms.if the bullet pierces to 0.05m of the target.find the force excerted by the bullet on the target

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 50.0 min at 95.0 km/h, 7.0 min at 80 km/h, and 50.0 min at 55.0 km/h, and spends 30.0 min eating lunch and buying gas. '

a. determine the average speed for the trip
b.Determine the distance between the initial and final cities along this route.