Author Question: A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver ... (Read 51 times)

littleanan · **on:** Jul 29, 2018

A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?

A)

1.43 N north
B)

7.00 103 N south
C)

1.43 103 N south
D)

1.43 N south
E)

143 N south

Question 2

In a two-slit experiment, the third bright fringe away from the central fringe is observed at an angle of 7.0. If the wavelength of the light is 490 nm, what is the distance between the two slits?

A)

3.6 10-5 m
B)

4.0 10-6 m
C)

2.1 10-6 m
D)

2.1 10-5 m
E)

1.2 10-5 m