# physical science

posted by .

two cars are headed straight for each other, each at a constant speed of 40mph.

A. do the two cars have the same speed?
b. do the two cars have the same velocity?
c. what is the acceleration of each car while moving at a constant speed

• physical science -

They have the same speed since speed is a scalar quantity.
They do not have the same velocity since velocity is a vector quantity.
They are moving at a constant speed. What do you thing the acceleration is?

• physical science -

For velocity you need both the speedometer AND a compass. It is a vector.

If you move at constant velocity, no acceleration.
Acceleration = rate of change of velocity.

## Similar Questions

1. ### physics

HI. Can someone please help me with this question. Two identical cars hit each other and lock bumpers. In each of the following cases, what are the speeds of the cars immediately after coupling bumpers?
2. ### physics

Two cars start from rest at the same location and at the same instant and race along a straight track. Car A accelerates at 6.6 fps2 to a speed of 90 mph and then runs at this constant speed. Car B accelerates at 4.4 fps2 to a speed …
3. ### Physics

A car moves in a circular path at 15 mph. Which of the following statements about the cars motion would be correct?
4. ### Physics

Two cars pass each other traveling at the same speed. One car has a constant velocity of 18.0 m/s east. The other car has a constant acceleration of 3.00 m/s^2, west. How much time will have elapsed until the cars are 128 m apart?
5. ### physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what …
6. ### physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what …
7. ### physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what …
8. ### physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what …
9. ### Physics

Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet?
10. ### Physics

Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet?

More Similar Questions