If no brakes are used immediately, an automobile with a starting velocity of 30 mph or 44 feet/s will collide with a person. If the driver is inebriated, he or she will be able to respond to the situation in three seconds. If the driver is not intoxicated, he or she can react for about 0.75 seconds. Determine the shortest stopping distance required for the driver (intoxicated, under influence of alcohol) to break on time if the automobile accelerates at -2 feet/s2. a.) 721 ft b.) 517 ft c.) 616 ft d.) 800 ft

Q: A train traveling at vo = 20.0 m/s begins to brake by applying a velocity-dependent instantaneous…

A: Write the expression for the velocity.

Q: Which of the following is true of the rock in this figure as it falls after being dropped from a…

A: When a body travels through a fluid media then it continues to accelerate until it reaches to a…

Q: A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a…

A: The magnitude of the required average acceleration is,

Q: Which one of the following objects has a average velocity of 20 mi/hour? O A car moves a distance of…

A: The average velocity of the object is the ratio of the total displacement and the total time. The…

Q: A female motorcycle rider at rest is passed by a friend traveling at a constant rate of 120.…

A: We have equations of motion as: Velocity=distancetime  Distance=U×t+12a×t2 where U is initial…

Q: A racing car starts from rest at t = 0 and reaches a final speed v at time t. If the acceleration of…

A: Average speed of the car vavg is,

Q: A train is traveling down a straight track at 35 m/s when the engineer applies the brakes, resulting…

A: Initial speed of the train, u = 35 m/s Acceleration, a = -1.0 m/s2 Time interval after applying…

Q: With respect to the motion of a car, describe a situation in which the car has zero speed but has a…

A: With respect to the motion of a car, describe a situation in which the car has zero speed but has a…

Q: Which one of the following objects has a average speed of 20 mi/hour? O A car moves a distance of 40…

A: Required : Which car has velocity 20 miles/hr

Q: A car is traveling along a straight road at a velocity of +38.8 m/s when its engine cuts out. For…

A: Consider the average acceleration of the car in the first period be a1, and its average acceleration…

Q: A car and a truck start from rest at the same instant with the car initially at some distance behind…

A: We assume that the car overtakes the truck in time t. This gives the total distance the truck…

Q: 11. You start from your house at 10:00am, goes to the grocery shop and then to your friend's house.…

A: Part A.  distance travelled by you will be:  d = d1 + d2 d1 = distance from your house to shop = 5…

Q: On a one lane road, a person driving a car at v = 78 mi/h suddenly notices a truck 0.65 mi in front…

A:

Q: An athlete swims the length of a 41.0-m pool in 15.0 s and makes the return trip to the starting…

A:

Q: A two-stage rocket accelerates from the rest at + 3.57 m /s/s 46.2 s . It then accelerates at + 2.98…

A: Given data: The acceleration of rocket in first stage is a1=+3.57 m/s/s=+3.57 m/s2. The time of…

Q: The velocity computed by the total distance travelled over the total time consumed. a. initial…

A: we know, average velocity = (total distance travelled)/ total time  therefore, the velocity computed…

Q: Give an example of a scenario where the magnitude of the average velocity of an object is zero while…

A: Before jumping on to scenario we will first discuss a few parameters of motion which are as…

Q: A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes…

A: Given:Time taken by the ball to reach its maximum height, t = 2.80 s

Q: Find the time it took the car to overtake the truck

A: Given initial velocity u=0

Q: The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows…

A: Given that, x=66.4 macceleration=-5.85 m/s2time=4.20 s Consider the kinematic equation, x=ut+12at2…

Q: If the velocity and acceleration of an object are in the opposite directions, O a. The speed of the…

A: As the direction of velocity is opposed by the direction of acceleration.

Q: 23. A motorcycle starts from rest and reaches a final speed v in time t. If the acceleration of the…

A: From the question it is given that  initial speed of motorcycle = u = 0 m/s final speed of…

Q: Average acceleration is determined by what? a. Change in time / change in velocity b. Change in…

A:

Q: A female motorcycle rider at rest is passed by a friend traveling at a constant rate of 120.…

A:

Q: A car and a truck start from rest at the same instant with the car initially at some distance behind…

A:

Q: A ball is dropped from the top of a tall building. At the same instant, a second ball is thrown…

A: The only force acting on both is gravitational force

Q: 1. A woman leaves her house to walk her dog. They stop a few times along a straight path. They walk…

A:

Q: A baseball with an initial velocity of 20 m/s [W] is hit by a baseball bat, changing its velocity to…

A:

Q: Describe the motion of a person not wearing a seat belt if the car stops suddenly- Select one: O a.…

A: solution as

Q: Which of the following statements is true about the average speed and the magnitude of the average…

A:

Q: A car travelling along a road with a speed of v= 3s^(3/2) m/s where s is in meters a. Determine the…

A:

Q: On a one lane road, a person driving a car at v = 78 mi/h suddenly notices a truck 0.65 mi in front…

A: Initial speed of the car is v1 = 78 mi/h  Truck is moving at a speed of v2 = 41 mi/h  Distance…

Q: During a training session a top athlete ran 100 m in 9.86 s. He then walked back in 90.9 s to start…

A: We know that average velocity (V) = total displacement/total time taken Here the athlete ran 100 m…

Q: .A truck starts from rest at t = 0 and reaches a final speed v at time t. Which of the following…

A: .A truck starts from rest at t = 0 and reaches a final speed v at time t. Which of the following…

Q: If the velocity and acceleration of an object are in the opposite directions, a. The speed of the…

A: If the velocity and acceleration of an object are in the opposite directions, the speed of the…

Q: A sailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at…

A: Given that the acceleration during the motion is constant so the equation of motion can be used to…

Q: A car initially at rest begins to accelerate at 1.25 m/s2 until its speed reaches 90.0 km/h and then…

A: Given data:  Initial velocity (V0) = 0 m/s Acceleration (a) = 1.25 m/s2 Final velocity (V) = 90.0…

Q: In which of the following cases does a car have a negative velocity and a positive acceleration? A…

A: Velocity and acceleration are vector quantities that is they both have magnitude as well as…

Q: Describe the motion of a person not wearing a seat belt if the car stops suddenly- Select one: O a…

A:

Q: A car is traveling along a straight road at a velocity of +36.0 m/s when its engine cuts out. For…

A: Given data, Initial velocity v0 =+36.0 m/s For the next twelve seconds t1 =12 s the cars slow down,…

Q: You drive West 30.0 km at 85 km/h and then drive East another 60.0 km at 95 km/h. Your average…

A: Given that --- You drive West 30.0 km at 85 km/h and then drive East another 60.0 km at 95 km/h.…

Q: brakes of a car whose initial velocity is 30 m/s are applied and then receives an acceleration of -2…

A:

Q: A ball is thrown straight upwards with a velocity of 15 m/s. It reaches the top of its flight then…

A: Average velocity = (Total displacement)/(Total time interval)

Q: Jack and Jill exercise in a 25.0 m long swimming pool. Jack swims 9 lengths of the pool in 136.1 s…

A:

Q: For a body moving with uniform acceleration its final velocity equals _________________. A) average…

A: Let us consider the variables as follows: v be the final velocity of body. u be the initial velocity…

Q: An apple is falling from an apple tree. Which of the following statements is true? a. Speed and…

A: Given data:  Apple is falling from tree Initial velocity is zero.

Q: A car is moving at a constant velocity when it is involved in a collision. The car comes to rest…

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 –