Sharon is driving on a straight road. She is driving north, and her speed is decreasing. If north is the positive direction, which of the following
statements is accurate?

A) Her velocity is positive, and her acceleration is negative.

B) Her velocity is negative, and
her acceleration is negative.

C) Her velocity is negative, and her acceleration is positive.

D) Her velocity is positive, and her acceleration is positive.

Plzz help

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Which notation is used to represent an alpha particle? a. b. c. d.