What are the initial position and velocity of the object
Answers
Answer:
20%) What is the initial position, velocity and acceleration both at t = 3 seconds, of an object for the given equation of x(t) = 4 t2 – t/2 – 8.
x(0) = -8 m
v(t=3) = 8t – ½ = 23.5 m/s v = dx/dt
a(t=3) = 8 m/s2 a = dv/dt
(20%) What is the acceleration of an object at t = 2 seconds if the velocity is given by the equation v(t) = 3t2 m/s
a = 6t = 12 m/s2 a = dv/dt
(20%) For each of the four vectors, state whether it is a position vector (P), a velocity vector (V), or an acceleration vector (A) for the particles.
1. P
2. V
3. V
4. A
(40%) A cannonball is fired 30° above the horizontal from the top of a cliff. The cannon is at height H = 100 m above ground level. The projectile lands at a distance of D = 160 m from the cliff, find the time in the air and initial speed of the projectile.
PHY131 Exam Ch 1 to 5 Name:
(20%) What is the initial position, velocity and acceleration both at t = 2 seconds, of an object for the given equation of x(t) = 3 t2 – t/4 – 6.
x(0) = -6 m
v(t=2) = 6t – ¼ = 11.75 m/s v = dx/dt
a(t=2) = 6 m/s2 a = dv/dt
(20%) Sprinter Carl Lewis's run at the 1987 World Championships is modeled with v = vo - vo e-bt, where vo = 12 m/s and b = 0.7 s-1. What was Lewis's acceleration at t = 0?
a = 0 – vo * -b * e-bt a = dv/dt
a = -12(-.7)*e0
a = 8.4 m/s2
(20%) For each of the four vectors, state whether it is a position vector (P), a velocity vector (V), or an acceleration vector (A) for the particles.
5. P
6. A
7. V
8. V
(40%) At what speed should an archerfish located at the surface of the water spit water (which exits at 60° above the horizontal) to shoot down a insect located at a horizontal distance of 1.00 m from the fish on a branch 0.1 meters above the water?
y = ½ g t2 + voy t + yo x = ½ a t2 + vox t + xo
Explanation:
Dear mate
INITIAL POSITION is that from a point a body is released or started. ... FINAL POSITION is that a body stopped or covered a distance from a point to another point
SPEED of something in a given direction