Question

# A car traveling at 35.0 km/h speeds up to 45.0 km/h in a time of 5.60...

A car traveling at 35.0 km/h speeds up to 45.0 km/h in a time of 5.60 s (interval A). The same car later speeds up from 65.0 km/h to 75.0 km/h in a time of 5.60 s (interval B). 1) Calculate the magnitude of the constant acceleration for the first interval. (Express your answer to three significant figures.)2) Calculate the magnitude of the constant acceleration for the second interval. (Express your answer to three significant figures.)3) Determine the distance traveled by the car during the first time interval. (Express your answer to three significant figures.)4-Determine the distance traveled by the car during the second time interval. (Express your answer to three significant figures.)

(1) First of all convert the speed in m/s -

v1 = 35 km/h = (35*1000) / (60*60) = 9.72 m/s

like-wise, v2 = 45.0 km/h = 12.5 m/s

t = 5.6 s

use the expression -

v2 = v1 + a1*t

=> 12.5 = 9.72 + a1*5.6

=> a1 = (12.5 - 9.72) / 5.6 = 0.50 m/s^2

(3) Distance travelled by the car in this interval s1 = (v2^2 - v1^2) / 2a1 = (12.5^2 - 9.72^2) / (2*.50) = 61.8 m

(2) v3 = 65 km/h = (65*1000) / (60*60) = 18.06 m/s

like-wise, v2 = 75.0 km/h = 20.8 m/s

t = 5.6 s

use the expression -

v2 = v1 + a1*t

=> 20.8 = 18.06 + a2*5.6

=> a2 = (20.8 - 18.06) / 5.6 = 0.50 m/s^2

(4) Distance travelled by the car in this interval s1 = (20.8^2 - 18.06^2) / 2a1 = (20.8^2 - 18.06^2) / (2*0.50)

= 106.50 m

#### Earn Coins

Coins can be redeemed for fabulous gifts.

Similar Homework Help Questions
• ### Physics question: A car traveling at 35.0 km/h speeds up to 45.0 km/h in a time...

Physics question: A car traveling at 35.0 km/h speeds up to 45.0 km/h in a time of 5.00s. The same car later speeds up from 65.0 km/h to 75.0km/h in a time of 5.00s. (a) Calculate the magntude of the constant acceleration for each of these intervals. (b) Determine the distance traveled by the car during each of these time intervals. Provide the formula and answers for both questions.

• ### A car moving at 90 km/h passes a 1.21 km -long train traveling in the same...

A car moving at 90 km/h passes a 1.21 km -long train traveling in the same direction on a track that is parallel to the road. Part A If the speed of the train is 71 km/h , how long does it take the car to pass the train? Express your answer using two significant figures. Part B How far will the car have traveled in this time? Express your answer using two significant figures. Part C If the car...

• ### Starting from rest, a car speeds up uniformly to 9.80 m/s in a time of 12.0...

Starting from rest, a car speeds up uniformly to 9.80 m/s in a time of 12.0 s. The car then travels with this speed for 20 seconds before slowing down at a constant rate to a stop in 24.0 seconds. Determine the total distance in meters traveled from start to end. Round your final answer to three significant figures.

• ### A woman drives a car from one city to another with different constant speeds along the...

A woman drives a car from one city to another with different constant speeds along the trip. She drives at a speed of 60.0 km/h for 20.0 min, 75.0 km/h for 25.0 min, makes a stop for 45.0 min, then continues at 45.0 km/h for 35.0 min, at which point she reaches her destination. (a) What is the total distance between her starting point and destination (in km)? __________km (b) What is the average speed for the entire trip (in...

• ### Constants | Periodic Table PartA A car traveling at 110 km/h strikes a tree. The tront...

Constants | Periodic Table PartA A car traveling at 110 km/h strikes a tree. The tront end ot the car compresses and the diver comes to rest after traveling 0.90 m What was the magnitude of the average acceleration ot the driver during the collision? Express the answer in terms of "g's,"where 1.00 g 980 m/s2 Express your answer using two significant figures. Submit Reauest Answer Provide Feedback

• ### A car races at a constant speed of 370 km/h around a flat, circular track 1.30...

A car races at a constant speed of 370 km/h around a flat, circular track 1.30 km in diameter. 1) What is the magnitude of the car's radial acceleration in m/s2? (Express your answer to two significant figures.)

• ### At the instant shown, cars A and B are traveling at the speeds v A =...

At the instant shown, cars A and B are traveling at the speeds v A = 21 km/h and vB = 62 km/h . (Figure 1) Figure 1 of 1 100 m Part A If B is accelerating at 1210 km/h? while A maintains a constant speed, determine the velocity of A with respect to B. Express your answer to three significant figures and include the appropriate units. I MÅR O 2 ? V A/B = 78.27 Submit Request Answer...

• ### Learning Goal Part A-Time for the Car to Reach 100 km/h ? To apply the concepts...

Learning Goal Part A-Time for the Car to Reach 100 km/h ? To apply the concepts of impulse and momentum to problems involving unknown forces, velocities, and times. Find the time it will take for the car to reach u 100 km/h from rest. A new rear-wheel drive automobile design is being tested and you have been asked to estimate its performance. The car without wheels (i.e., the body) has a mass of mc 1450 kg. The wheels (including tires)...

• ### A "rocket car" is launched along a long straight track at t = 0 s. It...

A "rocket car" is launched along a long straight track at t = 0 s. It moves with constant acceleration = 1.3 m/s^2. At t = 2.5 s, a second car is launched with constant acceleration a_2 = 7.8 m/s^2. At what time does the second car catch up with the first one? Express your answer using two significant figures. How far have the cars traveled when the second passes the first? Express your answer using two significant figures.

• ### A man on a road trip drives a car at different constant speeds over several legs...

A man on a road trip drives a car at different constant speeds over several legs of the trip. He drives for 30.0 min at 80.0 km/h, 18.0 min at 75.0 km/h, and 60.0 min at 40.0 km/h and spends 20.0 min eating lunch and buying gas. (a) What is the total distance traveled over the entire trip (in km)? (b) What is the average speed for the entire trip (in km/h)?