With what force will a car hit a tree if the car has a mass of 3000 kg and it is accelerating at a rate of 2 m/s2?
6000n
1500 n
1000 n
300 n

How many atoms of nitrogen are in the chemical formula ni(w on

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 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. the block's initial mechanical energy is 9.472 j.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.

What energy transformations occur each time the skateboarder rolls up the ramp?