A motorboat starting from rest travels in a straight line on a lake. (a) If the boat achieves a speed of 8.0 m/s in 10 s, what is the boat’s average acceleration? (b) Then, in 5.0 more seconds, the boat’s speed is 12 m/s. What is the boat’s average acceleration for the total time

Q: A cop car, at a constant speed of 110 km/h, is overtaken by a race car. Precisely 1.2 s after the…

A: Given data The constant speed of the cop car is u = 110 km/h. The time duration when it passes is…

Q: A brick is thrown straight down with an initial velocity of 2.2 m/s from a cliff. What is the rock's…

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Q: A student drives the 105-mi trip back to campus after spring break and travels with an average speed…

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Q: Motor accelerates from zero to 100 km / h in 20 seconds, and then comes to a complete stop in 40…

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Q: Suppose a dragster decelerates from 50.0 m/s with a constant acceleration. It comes to a stop in a…

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Q: a) What is the acceleration during the first 4 seconds of motion. ( include sign ) b) What is the…

A: NOTE: According to the guidelines we are allowed to answer only the first 3 subparts. If you want to…

Q: A motorist drives north for 35 minutes at 85 km/h and then stops for 15 minutes. He then continues…

A: Recall Average velocity=Total displacement/total time

Q: A speeding car passes a highway patrol checkpoint, then decelerated at a constant rate. After 5.00…

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Q: A car accelerates uniformly from a velocity of 20.0 km/h to 100.0 km/h in one minute. What is the…

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Q: A ball is thrown upward and returns to the ground in 10 sec. (a) What was its initial velocity? (b)…

A: Dgh

Q: The average person passes out at an acceleration of 7g (that is, seven times the gravitational…

A:

Q: If it takes a bicyclist 20 seconds to reach a speed of 10 mph from rest, what is her acceleration?…

A: SOlurion: Given that If it takes a bicyclist 20 seconds to reach a speed of 10 mph from rest,  For…

Q: The DR Horton Tower in Fort Worth is 400 m tall. Joe wants to set the world’s stair climbing record…

A: The expression from kinematics,

Q: An automobile moving at a constant velocity of 30 m/s passes gasoline station. Two seconds later,…

A: Constant velocity of automobile-1 v=30 m/s Acceleration of automobile-2 a=2 m/s2

Q: A student drives the 105-mi trip back to campus after spring break and travels with an average speed…

A: Given: Total distance of the trip = 105-mi, Average speed for the first part of the trip, v1 = 56…

Q: Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled…

A:

Q: Initially stationary (the train starts at rest), a train has a constant acceleration of 0.3 m/s2.…

A: Given: initial speed of train, u = 0 acceleration of train, a = 0.3 m/s2  time taken , t =  18 s

Q: An object falls from rest starting from a height of 50 meters above the pavement. (a) What is the…

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Q: The average person passes out at an acceleration of 7g (that is, seven times the gravitational…

A: Given:  acceleration, a = 7 g = 7 x 9.8 = 68.6 m/s2 initial velocity, u = 0 m/s  final velocity, v =…

Q: A car slows down (or speeds up) from a speed of 29 m/s to a speed of 48.9 m/s over a distance of 732…

A: If a car speeds up then it means it's accelerating and a is positive.  If a car is slowing down then…

Q: A long distance runner runs at an average speed of 7 mph. How long will it take the runner to run:…

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Q: A long distance runner has an average speed of 3.2 m/s. How far (in m) does the runner travel in 42…

A: Given information:The average speed of the runner (v) = 3.2 m/sThe time for which the runner runs…

Q: A car traveling 30 m/s due east turns a smooth corner and heads northeast. The car maintained a…

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Q: A car is moving on +X direction with 12 m/s and then accelerated to 20 m/s in 2 min. (A) find out…

A: Equation of kinematics: 1. v=u+at  2. x = ut +12at2.3. v2= u2 + 2ax Where u and v are initial…

Q: At the end of a race a runner decelerates from a velocity of 9.20 m/s at a rate of 1.90 m/s2. (a)…

A: Step 1: Part (a): Distance traveled The initial velocity (v0​​) is 9.20 m/s, and the deceleration…

Q: A sprinter starts from rest and accelerates to her maximum speed of 9.7 m / s in a distance of 9.7…

A: The initial speed of the sprinter is 0 m/s.The maximum speed of the sprinter is 9.7 m/s after…

Q: A speeder traveling at 40 m/sec along a straight road sees a police car in the distance.  He applies…

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Q: A driver wants to see how fast his car can go, so he goes out to the salt flats where he can drive a…

A: Given, Initial velocity,u  = 0 m/s ( starts from rest ) Acceleration,a = 8 m/s2 distance travelled…

Q: A car starts from rest and reaches a velocity of 100 km/h after accelerating uniformly for 10s. What…

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Q: A car starting from rest is given a constant acceleration of 5m/s2. (a) In how many seconds will it…

A: Given data:  Initial velocity (Vi) = 0 Acceleration (a) = 5 m/s2  Final velocity (Vf) = 100 m/s

Q: During a hard sneeze, your eyes might shut for 0.31 s. If you are driving a car at 81 km/h during…

A: Given data The time interval of a hard sneeze is given as t = 0.31 s. The speed of the car is given…

Q: erson on a road trip drives a car at different constant speeds over several legs of the trip. She…

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Q: An car runs the first 18 minutes at an average speed of 11 m/s. What must be the average speed…

A: Let the average speed of following 42 min be x m/s Let the distance traveled in that 42 min be d1 So…

Q: average speed in km/hr

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Q: Ferrari sports car can accelerate from rest to 81 km/h (about 60 mi/h) in 1.5 s. What is its average…

A: Given: The initial velocity of the car is 0 km/h. The final velocity of the car is 81 km/h. The time…

Q: A soccer ball is released from rest at the top of a grassy incline. After 6.2 seconds, the ball…

A: a) At rest t=0 and yi=0 at t=6.2sec yf=47 m

Q: What is the average speed in kilometers per hour for a runner that runs a distance of 5 km in a time…

A:

Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –