11th Grade Physics Midterm Study Guide
Ms. Stephanie Custodio
INSTRUCTIONS: Read carefully each problem and solve them tidily. Use the proper formulas and a scientific calculator to solve them. Write and circle your answers in ink. REMEMBER TO STUDY THE THEORY FROM THE BOOK AND NOTEBOOK TOO. 1. Calculate the linear momentum for each of the following cases: a. A proton with a mass of 1.67x10-27 kg moving with a velocity of 5.00x106 m/s straight up.
b. A 15.0g bullet moving with a velocity of 325 m/s to the right. c. A 75.0kg sprinter running with a velocity of10.0 m/s southwest. d. Earth (m= 5.98 x 1024 kg) moving in its orbit with a velocity equal to 2.98x104 m/s forward.
2. A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with a velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25s, what is the constant force exerted on the ball by the wall? 3. A football punter accelerates a 0.55kg football from rest to a speed of 8.0 m/s in 0.25 s. What constant force does the punter exert on the ball? 4. A 0.15 kg baseball moving at +26m/s is slowed to a stop by a catcher who exerts a constant force of -390N.
a. How long does it take this force to stop the ball?
b. How far does the ball travel before stopping?
5. A 0.025 kg golf ball moving at 18.0 m/s crashes through the window of a house in 5.0 x 10-4 s. after the crash, the ball continues in the same direction with a speed of 10.0 m/s. Assuming the force exerted in the ball by the window was constant, what was the magnitude of this force?