Question

In: Physics

The police are investigating a rear-end collision between two automobiles at an intersection. The approaching automobile...

The police are investigating a rear-end collision between two automobiles at an intersection. The approaching automobile has a mass of 1800 kg and an unknown velocity. It makes a rear-end collision with a stationary car whose mass is 2230 kg. The cars lock bumpers and skid off together and come to rest after skidding 10.5 metres. The skid marks indicate that the stationary car had its wheels locked but the approaching car did not. If the coefficient of kinetic friction between the wheels of the car and the pavement is 0.589, determine the initial speed of the approaching automobile just before the collision.

Solutions

Expert Solution

genius_generous answered 2 years ago
Next > < Previous

Related Solutions

A police cruiser, approaching a right-angled intersection from the north, is chasing a speeding car that...
A police cruiser, approaching a right-angled intersection from the north, is chasing a speeding car that has turned the corner and is now moving straight east. When the cruiser is 1 mi north of the intersection and the car is 1 mi to the east, the police determine with radar that the distance between them and the car is increasing at    2–√     mph. If the cruiser is moving at 60 mph at the instant of measurement, what is the speed of the...
Two vehicles are approaching an intersection. One is a 2300 kg pickup traveling at 13.0 m/s...
Two vehicles are approaching an intersection. One is a 2300 kg pickup traveling at 13.0 m/s from east to west (the ?x- direction), and the other is a 1300 kg sedan going from south to north (the +y?direction at 21.0 m/s ). Q1: Find the x -component of the net momentum of this system. Q2: Find the y-component of the net momentum of this system. Q3: What is the magnitude of the net momentum? Q4: What is the direction of...
Two automobiles with equal mass approach an intersection.  One vehicle is traveling eastward and the other...
Two automobiles with equal mass approach an intersection.  One vehicle is traveling eastward and the other vehicle is traveling northward.  The vehicles collide and stick together. After impact they travel on the road and then travel on a gravel covered shoulder until both cars stop. Only the northward bound vehicle left skid marks at an angle of 55 degrees north of east.  A police officer posted at the intersection clocked the eastward vehicle at 29 mph before impact. The northward...
Two automobiles with equal mass approach an intersection. One vehicle is traveling eastward and the other...
Two automobiles with equal mass approach an intersection. One vehicle is traveling eastward and the other vehicle is traveling northward. The vehicles collide and stick together. After impact they travel on the road and then travel on a gravel covered shoulder until both cars stop. Only the northward bound vehicle left skid marks at an angle of 55 degrees north of east. A police officer posted at the intersection clocked the eastward vehicle at 29 mph before impact. The northward...
Given Choosing between two proposed traffic safety project intersection of a high crash rate intersection. Two...
Given Choosing between two proposed traffic safety project intersection of a high crash rate intersection. Two solutions are proposed. Project A: build a 5.57 million dollars overpass to separate the two roadways. The estimated value of the crash avoided will be 513000 per year over the next 20 years. Project B: improve the geometry and signal timing at the intersection at a cost of 418000 dollars. The estimated value of the crash avoided will be 61800 dollars per year over...
A collision occurs between two equal masses m1 and m2. Before the collision m2 is stationary....
A collision occurs between two equal masses m1 and m2. Before the collision m2 is stationary. After the collision both masses are moving differently. After the collision the position of the center of mass and motion of the center of mass respectively are best described as. ANSWER CHOICE A) halfway between the two masses, and stationary B) halfway between the two masses and moving C) halfway between the two masses and moving with the speed of mass m1 D) centered...
Two automobiles collide. One automobile of mass 1.13 x 103 kg is initially traveling at 25.7m/s...
Two automobiles collide. One automobile of mass 1.13 x 103 kg is initially traveling at 25.7m/s [E]. The other automobile of mass 1.25 x 103 kg has an initial velocity of 13.8 m/s [W]. The vehicles become attached during the collision             (a) Determine the magnitude and direction of the change in momentum for each automobile in question 7.             (b) How are these two quantities related?             (c) What is the total change in the momentum of the two...
We look at a collision between two identical atoms that form a molecule in the process....
We look at a collision between two identical atoms that form a molecule in the process. We assume that each atom has mass ? and can be considered as a point particle. We assume that all external forces are small relative to the forces between the atoms. We therefore do not need to take consideration of some external forces. We begin with a simplified model where the connection is instant (without spring). Atom A moves in ?direction in distance ?...
- (a) What factors determine whether a collision between two molecules will lead to a chemical...
- (a) What factors determine whether a collision between two molecules will lead to a chemical reaction? (b) According to the collision model, why does temperature affect the value of the rate constant? (c) Does the rate constant for a reaction generally increase or decrease with an increase in reaction temperature?
The time intervals between two consecutive accidents in an intersection were recorded to be 3, 10,...
The time intervals between two consecutive accidents in an intersection were recorded to be 3, 10, 2, 3, 3, 11, 7, and 5 days. Suppose the time interval is geometrically distributed. Determine its parameter using the method of moments, and using the method of maximum likelihood. Compare the results.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT