phyics

posted by .

find the acceleration if the velocity changes from:
a) 2m/s to 4m/s in 4s
b) 5m/s to 10m/s in 2s
c) 100m/s to 120m/s in 5s
d) 86m/s to 94m/s in 4s
e) 21m/s to 35m/s in 18s

thank you!

  • phyics -

    acceleration is (change in velocity)/(time used)

    That is, keeping track of the units,

    acceleration(m/s^2) = velocity(m/s) / time(s)

    a) (4-2)m/s / 4s = 2m/s / 4s = 1/2 m/s^2

    Do the others in like wise. Come on back if you get stuck, or just want confirmation of your answers.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    a lunar landing module is descending to the moon's surface at a steady velocity of 10 m/s. At a height of 120m, a small object falls from its landing gear. Taking the moon's gravitational acceleration as 1.6m/s^2, at what speed, in …
  2. college physics

    using the quadratic equation on a 2 dimensional projectile motion problem... i am solving for tf and i have it worked all the way down to: -100m(tf)-100m(tf) / -10m/s^2(tf)^2 or -200m(tf) / -10m/s^2(tf)^2 is the answer 20 seconds?
  3. Physics

    A particle experiences a constant acceleration that is north at 100m/s^2. At t=0, its velocity vector is 70m/s east. At what time will the magnitude of the velocity be 100m/s?
  4. Physics - Kinematics

    Need some help with my homework! Question 7 a) Acceleration is the rate of change of velocity Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration …
  5. Physics HELP!!

    Two horizontal forces F1 and F2, are pulling an object of mass 3.05kg from two opposite sides. F1 pulls to the right and F2 pulls to the left. The magnitude of F1 is 99.2N. The object moves strictly along the horizontal x-axis, which …
  6. Physics

    A bear running initial speed of 4m/s accelerates uniformly for 18s. What is the bears max speed if it travels 135m during the 18s of acceleration
  7. Physics

    An object with mass 8.5kg is moving vertically upward with a velocity if 35m/s at a height of 100m above the ground. Find the time the object takes to reach the ground Thanks!!
  8. physics

    he a body is moving in a circular track of radius 100m with a velocity 120m/s.determine the banking angle of the track (g=9.8m/s)
  9. Physics

    A 250kg rollercoaster cart loaded with people has an initial velocity of 3m/s. Find the velocity of the cart at part A (10m high), B (35m), and C (44m) Assume that friction is negligible.
  10. Physics

    An athlete finished the 100 meter race in 10sec. What was his average speed?

More Similar Questions