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MT1clicker practice

# Iftheshellsfollowtheparabolic trajectorieswithsame

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Unformatted text preview: sly. B. Not enough info is given. 0 of 30 A battleship simultaneously fires two shells with the same initial speed at enemy ships. If the shells follow the parabolic trajectories shown, which trajectory corresponds to the shell fired with a higher initial vertical velocity? 40 A Battleship B 1. A . 2. Both have the same initial horizontal velocity. 3. B. 4. Not enough info is given. 25% 25% 25% 25% 0 of 30 A battleship simultaneously fires two shells with different initial speeds at enemy ships. If the shells follow the parabolic trajectories with same maximum height as shown below, which ship gets hit first? Battleship 40 B A 25% 25% 25% 25% 1. 2. 3. 4. A. Both are hit simultaneously. B. Not enough info is given. 0 of 30 A block sits at rest and stays at rest on a slide with frictional surfaces. Which of the following sketches most closely resembles the correct freebody diagram for all forces acting on the block? Each red arrow represents a force. Observe their number and direction, but ignore their lengths. slide A B C D 0 of 5 40 0% D 0% C 0% B A 0% Robert lifts the blue box, which weighs 1000 N, just a little way off the ground and holds it for 2 minutes, as shown. With what force does he have to pull on the rope to hold the box off the ground? 0 of 30 of th e 20 Ab o 00 N on N 00 10 50 0 N N 0% ve 0% N 0% 0 N 500 N 1000 N 2000 N None of the Above 0 1. 2. 3. 4. 5. 0% e 0% Frictionless pulley pulley 40 1000 N Now, Robert pulls on the rope at an angle. With what force does he have to pull on the rope to hold the box off the ground? 0 of 30 Frictionless 45 45o pulley Ab o ve 0% No n e of th e 20 00 N 0% N 0% 14 00 N 0% 10 00 N 0% 70 0 N 0% 50 0 N 50 N 0 N 50 N 500 N 700 N 0% 0% 1000 N 1400 N 2000 N None of the Above 0 1. 2. 3. 4. 5. 6. 7. 8. 1000 N40 Robert again lifts the 1,000 N weight just a little off the ground using a new technique as shown below. With what force does he have to pull on the rope to hold the box off the ground? 0 of 30 0% 0% N o n 2 e o0 0 0 f t N h e A b o v e 0% 1 9 9 2 N 0 N 87.15 N 174.3 N 996.2 N 1000 N 1992 N 2000 N None of the Above 0% 1 0 0 0 N 0% 9 9 6 .2 N 0% 1 7 4 .3 N 8 7 .1 5 N 1. 2. 3. 4. 5. 6. 7. 8....
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