True or false: it is legal for a goalie to jump forward or come off his line during a penalty kick

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths