a van travels a distance d=25.6m in the positive x direction in a time t1=23.7s, at which point it brakes coming to a rest in t2=8.33sa. what was the van's avergae velocity in the horizontal direction in m/s during the t1 time period?b.assuming the van started from rest and moved at a constant acceleration, what was the acceleration in m/s2 during the time interval t1?c. what was the van's instantaneous velocity in the horizontal direction in ms when it was braking?d. using the result from part c, what was the van's horizontal component of acceleration in m/s2 during the braking period?

a van travels a distance d=25.6m in the positive x direction in a time t1=23.7s, at which point it brakes coming to a rest in t2=8.33sa. what was the van's avergae velocity in the horizontal direction in m/s during the t1 time period?b.assuming the van started from rest and moved at a constant acceleration, what was the acceleration in m/s2 during the time interval t1?c. what was the van's instantaneous velocity in the horizontal direction in ms when it was braking?d. using the result from part c, what was the van's horizontal component of acceleration in m/s2 during the braking period?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 47PE: (a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is...

See similar textbooks

Similar questions

At time t = 0, a particle has a velocity of m v = 4.00. The following graph shows the particles a(t) S acceleration vs. time. a. What was the particle's velocity at t = 3.00s ? 2 4 t b. What was the particle's instantaneous acceleration time(s) at t = 3.00s ? С. What was the average acceleration between t = 1.00s and t = 3.00s ? 4- 2. acceleration(m/s)
A ball rolls down from the top of an inclined plane. The displacements for the first 3 seconds are 2.40 m, 9.84 m, and 22.00 m. a. What is the average velocity of the ball at the end of 1s? 2s? 3s? b. What is the average acceleration of the ball at the end of 1s? 2s? 3s? c. What is the average of the accelerations obtained in (b)?
A stone is dropped from rest from the top of a high-rise. It takes △t = 2.6 s forit to reach the ground. a. What is the initial velocity, Vi, of the stone in m/s? b. What is the value of the magnitude of acceleration, in m/s^2?? c. Express the final velocity vf of a object travelling with an acceleration a for a time period △t which starts with an initial velocity vi. d. Calculate the magnitude of vf in m/s.e.Express the displacement △y of an object travelling with acceleration a during a time period △t that has an initial velocity vi.
Consider an object moving along a line with the given velocity v. Assume time t is measured in secondsand velocities have units of m/s.a. Determine when the motion is in the positive direction and when it is in the negative direction.b. Find the displacement over the given interval.c. Find the distance traveled over the given interval.v(t) = 50e-2t on [0, 4]
A student begins at rest and then walks north at a speed of v1=0.65m/s. The student then turns south and walks at a speed of v2=0.28m/s. Take north to be the positive direction. a)What is the student's overall average velocity vavg, in meters per second, for the full trip assuming the student spent equal times at speeds v1 and v2? b) If the student travels in the stated directions for 30.0s30.0s at speed v1 and 20.0s at speed v2, what is the net displacement, in meters, during the trip? c) If it takes the student 1.2s to reach the speed v1, from rest, what is the magnitude, in meters per squared second, of the student’s average acceleration during that time?
A scooter begins at rest at t0=0 seconds. The scooters starts moving, and eventually covers a distance d= 651m, in a time tf= 104 seconds. In a coordinate system with north being the positive x-direction, the scooter's motion is in the northern direction. What wa the scooter's average speed, during this time period, in meters per second? What was the scooters displacement in the northern direction during this person, in meters? What was the scooter's average velocity in the northern direction, in this period in meters per second? If the scooter's final velocity at tf was 12 m/s, what was the scooter's average acceleration in the northern direction, during this period in m/s%^2?
In an unknown planet, in which the acceleration due to gravity is constant, a rocket is launched straight up. The velocity at t = 3.00 s is 10 m/s upward. Then, at t = 7.00 s, the velocity is -4.00 m/s downward. a. Draw a sketch of the situation. b. What is the initial velocity of the rocket? c. What is the acceleration that the rocket experiences?
A rocket is launched with an acceleration given by a(t)=2tj, where t is time in seconds. Find the speed of the rocket at time t = 2.0s assuming the rocket is launched from ground with an initial velocity v0=5i+2j (m/s). O A. 2.4 m/s B. 20 m/s OC. 9.3 m/s O D. 7.8 m/s
A bird is flying due east. Its distance from a tall building is given by x(t) = 28 m+ (12.4) t-(0.045) ³ t3 a. What is the velocity of the bird when t = 8 seconds? b. What is the acceleration of the bird when t = 8 seconds?
A stone is dropped at height 500 m from the ground. After 2 seconds, another stone isthrown upward with an initial velocity of 70 m/s. Assume acceleration due to gravity is9.81 m/s2.a. What is the time when they will meet?b. What is the height h, from the ground, where they will meet?
A particle's position as a function of time is given by the equation r(t) : m 1.00 4.00 m S а. What is the particle's velocity as a function of time? (Leave your answer in component form.) b. What is the particle's average velocity between t =-1.00s and t=+2.00s ? (Leave your answer in component form.)
A football quarterback runs 11.5 m straight down the playing field in 2.42 s. He is then hit and pushed 2.75 m straight backward in 1.64 s. He breaks the tackle and runs straight forward another 23.1 m in 5.54 s. We assume the forward direction to be positive, and the backward position to be negative. Calculate his average velocity in m/s a. for each of the three intervals; b. for the entire motion. Hint a. His average velocities for each of the three intervals are o first interval v₁ = m/s Enter an integer or decimal number [more..] m/s o second interval v₂ = m/s othird interval v3 = b. His average velocity for the entire motion is v = m/s