Physics 1 Midterm Exam Review 2
PHYSICS 1 MIDTERM EXAM REVIEW #2
1. A 6.0-N force and an 8.0-N force act concurrently on a point. As the angle between these forces increases from 0° to 90°, the magnitude of their resultant (1) decreases (2) increases (3) remains the same
2. A car increases its speed from 9.6 m/s to 11.2 m/s in 4.0 s. The average acceleration of the car during this 4.0-second interval is (1) 0.40 m/s2 (3) 2.8 m/s2 (2) 2.4 m/s2 (4) 5.2 m/s2
3. What is the speed of a 2.5-kilogram mass after it has fallen freely from rest through a distance of 12 m? (1) 4.8 m/s (3) 30. m/s (2) 15 m/s (4) 43 m/s
4. A machine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 m/s. The ball returns to level ground. Which combination of changes must produce an increase in time of flight of a second launch? (1) decrease the launch angle and decrease the ball’s initial speed (2) decrease the launch angle and increase the ball’s initial speed (3) increase the launch angle and decrease the ball’s initial speed (4) increase the launch angle and increase the ball’s initial speed
5. A plane flying horizontally above Earth’s surface at 100. m/s drops a crate. The crate strikes the ground 30.0 s later. What is the magnitude of the horizontal component of the crate’s velocity just before it strikes the ground? [Neglect friction.] (1) 0 m/s (3) 294 m/s (2) 100. m/s (4) 394 m/s
6. A woman with horizontal velocity v1 jumps off a dock into a stationary boat. After landing in the boat, the woman and the boat move with velocity v2. Compared to velocity v1, velocity v2 has (1) the same magnitude and the same direction (2) the same magnitude and opposite direction (3) smaller magnitude and the same direction (4) larger magnitude and the same direction
7. A ball attached to a string is moved at constant speed in a horizontal circular path. A target is located near the path of the ball as shown in the diagram.
1. A 6.0-N force and an 8.0-N force act concurrently on a point. As the angle between these forces increases from 0° to 90°, the magnitude of their resultant (1) decreases (2) increases (3) remains the same
2. A car increases its speed from 9.6 m/s to 11.2 m/s in 4.0 s. The average acceleration of the car during this 4.0-second interval is (1) 0.40 m/s2 (3) 2.8 m/s2 (2) 2.4 m/s2 (4) 5.2 m/s2
3. What is the speed of a 2.5-kilogram mass after it has fallen freely from rest through a distance of 12 m? (1) 4.8 m/s (3) 30. m/s (2) 15 m/s (4) 43 m/s
4. A machine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 m/s. The ball returns to level ground. Which combination of changes must produce an increase in time of flight of a second launch? (1) decrease the launch angle and decrease the ball’s initial speed (2) decrease the launch angle and increase the ball’s initial speed (3) increase the launch angle and decrease the ball’s initial speed (4) increase the launch angle and increase the ball’s initial speed
5. A plane flying horizontally above Earth’s surface at 100. m/s drops a crate. The crate strikes the ground 30.0 s later. What is the magnitude of the horizontal component of the crate’s velocity just before it strikes the ground? [Neglect friction.] (1) 0 m/s (3) 294 m/s (2) 100. m/s (4) 394 m/s
6. A woman with horizontal velocity v1 jumps off a dock into a stationary boat. After landing in the boat, the woman and the boat move with velocity v2. Compared to velocity v1, velocity v2 has (1) the same magnitude and the same direction (2) the same magnitude and opposite direction (3) smaller magnitude and the same direction (4) larger magnitude and the same direction
7. A ball attached to a string is moved at constant speed in a horizontal circular path. A target is located near the path of the ball as shown in the diagram.