The balls velocity started at 20m/s and increased to 40 m/s in 3 seconds. What was the acceleration for the ball? (round to hundredth if needed)

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?