1. A bullet is moving towards a block as shown in the picture. The bullet after the collision sticks into the mass of 2 kg: (25 points)What should be the minimum speed of the bullet so the bullet and mass are lifted the height shown in the picture? Hint: Use trigonometry to find ”h” and use the conservation of momentum and energy!

Will you chech and finish these for me, because i am stumped with them.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.