# Physics

A 1700 kg car has a speed of 24 m/s. If it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

1. 👍 1
2. 👎 0
3. 👁 200
1. Impulse: change momentum: 1700*24

1. 👍 0
2. 👎 0
2. or
V = Vo + a*t = 0.
24 + a*7 = 0,
a = -3.43 m/s^2,
F = M*a = 1700 * (-3.43) = -
The negative sign means the force opposes the motion.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Maths

A speed camera takes two photographs of a car.Photo 2 was taken 0.5 seconds after Photo 1.Marks on the road are 0.8 meters apart.Calculate the average speed of the car in m/s? 7.2 m/s but when i submit answer i get 2 marks only

asked by Anonymous on March 4, 2017
2. ### science- physics

A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3 m/s/s.How much time elapses before the motorcycle is moving as fast as the car?

asked by Laura on September 27, 2015
3. ### Maths

A speed camera takes two photographs of a car. Photo 2 was taken 0.5 seconds after Photo 1. Marks on the road are 0.8 meters apart. Calculate the average speed of the car in m/s.

asked by Bella on February 2, 2017
4. ### AP Calculus

A race car is running practice laps in preparation for an upcoming race. To judge how the car is performing, the crew takes measurements of the car's speed S(t) (in miles per hour, or mph) every minute. The measurements are given

asked by Anonymous on April 25, 2016
5. ### Math

The time it takes to cover the distance between two cities by car varies inversely with the speed of the car. The trip takes 3 hours for a car moving at 40 mph. How long does the trip take for a car moving at 60 mph?

asked by Anonymous on February 3, 2016
1. ### physics

two cars start on opposite sides of a circular track. One car has a speed of 0.015 rad/s;the other car has a speed of 0.012 rad/s. If the cars start p radians apart, calculate the time it takes for the fatser car to catch up with

asked by israa on August 24, 2012
2. ### Calculus

A race car is running practice laps in preparation for an upcoming race. To judge how the car is performing, the crew takes measurements of the car's speed S(t) (in miles per hour, or mph) every minute. The measurements are given

asked by Anonymous on April 23, 2016
3. ### Physics

Two identical cars approach an intersection at the same speed at the same time as shown in the diagram. Car A takes a left turn into the left lane and car B takes a right turn into the right lane, as shown. Neither car changes

asked by james on April 18, 2020

A 8000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law and have spring

asked by Kate on April 3, 2011
5. ### Science

A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed

asked by Rob on July 18, 2012
6. ### Physics

What average force is required to stop an 1700 kg car in 7.0 s if the car is traveling at 75 km/h?

asked by Ariel on September 8, 2010