Answered: A car backs up with an acceleration of…

A car backs up with an acceleration of 3.5m/s² [S]. If its final velocity after 2.0s is 9.0 m/s [S], what will be its initial velocity? 2.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: 14. A dog travels from point A to point B in 4.0s. If the dog was displaced 12 m (E) , what was its…

Q: Over a period of 3.0 s a car’s velocity changes from 18 m/s [W] to 12 m/s [W]. What is the car’s…

A: Given: t=3.0 su=18 m/sv=12 m/s

Q: A snail accelerates at a rate of 0.01 m/s^2, how long does it take to travel 10 cm? What is its…

Q: When X = 5t^2+ 10t -3, the velocity at 4s is: 50 m/s .A 110 m/s .B 25 m/s .C 30 m/s .D

A: The position of an object is given by a function of time as shown below. x=5t2+10t-3 The velocity is…

Q: A go-cart, initially at rest, accelerates downhill at a rate of 3.0 m/s² for 8.0 s. Calculate the…

A: Given data: Initial velocity (u) = 0 m/s Acceleration (a) = 3.0 m/s2 Time (t) = 8.0 s Required:…

Q: An object at rest accelerates at 3.7 m/s^2 for a distance of 20 m. what is its final velocity?

A: Given data: Initial velocity (Vi) = 0 m/s Acceleration (a) = 3.7 m/s2 Distance (d) = 20 m Required:…

Q: An object has an initial velocity 4.3î + -3.7j m/s. Over a v1 = period of time t= 1.4 s, its…

A: Given, v1→=4.3i^-3.7j^v2→=-2i^+0.5j^ t= 1.4 s

Q: A dragonty flies from point A to point B along the path shown in the figure in 1.50 (Figure 1)…

A: Given, The path is shown in the figure of a dragonfly.

Q: How high does a rocket go if 8.45 km/skm/s ? Ignore air resistance and the Earth's rotation.

Q: In m/s?, what is the acceleration when t = 7.5 sec? Express your answer as an integer, not as a…

A: The acceleration at a time in velocity-time graph represents the at that time.

Q: A tortoise can run with a speed of 0.11 m/s, and a hare can run 20 times as fast. In a race, they…

A: Given data *The speed of tortoise is vt = 0.11 m/s *The speed of the hare is vh = 20 × vt = (20 ×…

Q: A runner is moving with a speed of 2.68[m/s]. How long will it take the runner to complete a 5.0[km]…

A: The expression for find time taken by the runner to complete the race is t=dv

Q: Which of the following is the velocity graph for a negative initial velocity and a positive…

A: To determine the correct velocity-time that represents the given conditions. Given:The initial…

Q: 3 1 1 3 4 5 t (s) By how much does the velocity change between t = 1 s and t = 5 s? It decreases by…

A: Here we will try to find change in velocity when time equals t1=1sec to t2 = 5sec Which will be =…

Q: After 3 seconds the speed of the rock is ____ m/s.

Q: Once fired, a bullet accelerates at 6.8 x 104 m/s2 through a rifle barrel. If the barrel is 0.8…

A: The kinematic equation of motion of an object is given by Where S = distance traveled, u = Initial…

Q: how fast was the bullet going as it left the barrel?

A: Given Acceleration of bullet a= 6.8×104 m/s2 Distance travelled by bullet s = 0.8 m To find Final…

Q: 3, An object is accelerated from rest at a constant rate of S.00 m/s'. What will be its speed after…

A: Given data The acceleration of the object is given as a = 5 m/s2. The initial velocity of the…

Q: 4. 0 Road Race OO OO 2 3 One person started in a car, ran out of gas, and finished on a pogo stick.…

A: Page 1

Q: In 2.5 s, a car increases its speed from 20.0m/s to 25.0m/s. What is the acceleration of the car? 5…

A: Given Initial velocity is v0= 20.0 m/s Final velocity is v= 25.0 m/s Time taken is t= 2.5 s

Q: Given the quantities a=4.5 m, b=1.4s, c=43 m/s, what is the value of the quantity d = cb²

A: We are given 3 physical quantities. We are given the values also for those physical quantities. We…

Q: Susan is 2.25 m [W] of the park and her good friend, Mary, is 1.76 m [E] of the park. If it took…

Q: A bus drives east at 10.0 m/s. After 3.0 minutes, the bus accelerates at 0.500 m/s^2 until it…

A: See below

Q: On a straight 1.0 km track, a race car accelerates from rest to its top speed through 325 m [W] at…

A: x = 1 km = 1000 m x1 = 325 m v1,i = 0 m/s a1 = 3.5 m/s2 a2 = -1.9 m/s2

Q: shot putter releases the shot some distance above the level ground with a velocity of 12.0 m/sm/s,…

Q: 2. A marble (50 gm) is moving initially at 10cm/s before striking a resting puck (0.5kg) head on.…

Q: . A cheetah can accelerate from rest to a speed of 30 m/s in 7s. What is its acceleration? Given:…

A: Given: Initial velocity (v0) = 0 m/s Final velocity (v) = 30 m/s Time (t) = 7 s Unknown:…

Q: Over a period of 3.0 s a car's velocity changes from 18 m/s [W] to 12 m/s [W]. What is the value of…

A: Given: The time interval is 3 s. The initial velocity of the object is 18 m/s in the west direction.…

Q: A fish swims 450 m [E] then 250 m [W] in 25 seconds. What is the average velocity of the fish?

Question

2.
A car backs up with an acceleration of 3.5m/s² [S]. If its
final velocity after 2.0s is 9.0 m/s [S], what will be its
initial velocity?

Expert Solution

Step 1

$a c c e l e r a t i o n, a = - 3.5 \frac{m}{s^{2}} f i n a l v e l o c i t y, v = 9 \frac{m}{s} t i m e, t = 2 s i n i t i a l v e l o c i t y, u = ?$

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

A 150kg fish swimming at 8.0m/s swallows a 15kg fish swimming towards it at 4.0m/s. What is the speed of the larger fish immediately after eating the little fish?
Neglecting air resistance, what is the speed (in m/s) of an object just before striking the ground if it was dropped at rest and fell for 4.4 seconds? Your Answer:
What is her velocity at 15 s?
49 4:05 O O A (VPN KB/S 10.0 79 An object falls a distance h from rest. If it travels 0.450h in the last 1.00 s, find (a) the time and (b) the height of its fall. (a) Number i Units (b) Number i Units ()
The 25-Mg boxcar A 16m/s to the right is coasting on the horizontal track when it encounters a 9-Mg car B coasting at 2m/s toward it. If the two cars meet and couple together, determin common speed in m/s just after the coupling. Please see details below. Rounding numbers to 2 decimal places at the end.
Please Aspa
6. A particle is moving along a straight line. After t seconds the distance the particle has travelled is x cm, its velocity is v cms- and the acceleration a of the particle is given by the differential equation a = 0.035 v2 Given that when t= 0, then x = 0 and v= 22 cms-!, calculate the velocity of the particle when t = 2 seconds.
3. A speeding car going 30 m/s passes a police car that is at rest. At the moment the speeder passes, the police car pulls out and accelerates 4 m/s/s. The speeder continues going 30 m/s. Which is ahead and by how much after 10 seconds? When does the police car catch the speeder?