G Problem 5. A 100 g firecracker is launched vertically into the air and explodes into two pieces at the peak of its trajectory. If a 72 g piece is projected horizontally to the left at 20 m/s, what is the speed and direction of the other piece

What is the relationship between the wavelength of a wave and it's energy?

Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.