Vi = 0 m/s T = 10 s Find d = Find v f =
Guided Practice Problems
Find the uniform acceleration that causes a car’s velocity to change from 32m/s to change to 76 m/s. In an 8.0 s period.
Given: V i = 32 m/s V f = 76 m/s T = 8.0 s Unknown: a =
Equation: A = Δv Δt
Answer: 5.5 m/s/s
Solution: 76m/s-32m/s / 8 s =
A supersonic jet flying at 155 m/s is accelerated uniformly at the rate of 23.1 m/s 2 for 30 s. A. What is its final velocity? B. The speed of sound in air is 331 m/s. How many times the speed of sound is the plane’s final speed?
Given: Time = 30 s A = 23.1 m/s 2 V i = 155 m/s ______________ V f = Speed of sound is 331 m/s Unknown: V f =
Equation: A V f = v i + at
Equation B: N= 848 m/s/331m/s=
Answer to A = 848 m/s
Answer to B:2.56 times
Solutions for A: 155m/s + (23.1 m/s/s)(30.0 s) =vf
Solution for B : 848 m/s/331m/s =
Determine the displacement of a plane that is uniformly accelerated from 66 m/s to 88 m/s in 14 s.
Given: 66 m/s = V i 88 m/s = V f T = 14 s Unknown: d
Equation D=(vf + vi)t/2 =
Answer #3: 550 m
Solution #3 : (88 m/s + 66 m/s)14 s/2 =
If a bullet leaves the muzzle of a gun with a speed of 500 m/s, and the barrel of the rifle is.9 m long. What is the acceleration of the bullet while in the barrel?
Given: V f = 500 m/s D =.9 m V i = 0 m/s Unknown: A =
Equation: a = V f 2 – v i 2 /2d
Answer :1.38 X 10 5 m/s/s
Solution: (500 m/s )2 -0 /(2) (0.9 m) =
A plane travels 600 m while being accelerated uniformly from rest at the rate of 5.0 m/s 2. What final velocity does it attain?
Given: d = 600 m a= 5.0 m/s 2 V i = 0 m/s Unknown: V f =
Equation: V f 2 =v i 2 + 2ad
Answer: 77.5 m/s
Solution: Sq root 0 +2(5.0 m/s/s)(600 m) =
Page 82: 1,5, Page 83 : 8,9,10, 16 Page 84: 24, Reviewing concepts: 1,2,3,8, Applying concepts: 3, 8, 9 Due thursday
V f = v i + at d = ½ (v f + V i )t d = v i t + ½ at 2 V f 2 = v i 2 + 2ad V i v f a t V i d v f t V i d a t V f d v i a