36. How much force must act on 1,800 kg car to give it an acceleration of 0.50 m/s²? a. 180N b. 360N c. 720N 37. What are the direction of the arrow for velocity and acceleration when the ball is thrown downward? a. Its velocity and its acceleration both points upward. b. Its velocity and its acceleration both points downward. 38. c. Its velocity points downward and its acceleration points upward. d. Its velocity points upward and its acceleration points downward. A sack of rice with a mass of 50 kg is pulled across a floor. It requires a force of 150 N to move the sack What is the acceleration of the object? a. 0 m/s² b. 1 m/s² c. 2 m/s² d. 3 m/s² 39. A batter hits a baseball so that it leaves the bat at speed v = 21.0 m/s at an angle theta = 48.2°. What is the position of the ball at t = 3s? a. (-41.99, 2.86) b. (41.99, 2.86) What is the height h at this time? a. 6.49m b. 6.48m 40. x = 15m + (3.0m/s²) t² What is the displacement of the tiger at 2 seconds? a. 27 m b. 28 m E. Other: c. (41.89, 2.85) c. 29 m. d. 900N c. 6.47m A tiger is crouched 15 m to the east of a tree. At time t=0 the tiger begins to run due east toward a goat that is 60 m to the east of the tree. During the first three seconds of the attack, the tigers coordinate x varies with time according to the equation d. 30 m How will you represent the equation for instantaneous velocity? a. 6t m/s² b. 6t m/s c. 6t² m/s² E. Other: d. (-41.89, 2.85) d. 6.46m What is the average velocity of the tiger between the interval 3 seconds and 2 seconds? a. 15 m/s. b. 27 m/s c. 42 m/s d. 50 m/s E. Other: d. 3t2 m/s2
36. How much force must act on 1,800 kg car to give it an acceleration of 0.50 m/s²? a. 180N b. 360N c. 720N 37. What are the direction of the arrow for velocity and acceleration when the ball is thrown downward? a. Its velocity and its acceleration both points upward. b. Its velocity and its acceleration both points downward. 38. c. Its velocity points downward and its acceleration points upward. d. Its velocity points upward and its acceleration points downward. A sack of rice with a mass of 50 kg is pulled across a floor. It requires a force of 150 N to move the sack What is the acceleration of the object? a. 0 m/s² b. 1 m/s² c. 2 m/s² d. 3 m/s² 39. A batter hits a baseball so that it leaves the bat at speed v = 21.0 m/s at an angle theta = 48.2°. What is the position of the ball at t = 3s? a. (-41.99, 2.86) b. (41.99, 2.86) What is the height h at this time? a. 6.49m b. 6.48m 40. x = 15m + (3.0m/s²) t² What is the displacement of the tiger at 2 seconds? a. 27 m b. 28 m E. Other: c. (41.89, 2.85) c. 29 m. d. 900N c. 6.47m A tiger is crouched 15 m to the east of a tree. At time t=0 the tiger begins to run due east toward a goat that is 60 m to the east of the tree. During the first three seconds of the attack, the tigers coordinate x varies with time according to the equation d. 30 m How will you represent the equation for instantaneous velocity? a. 6t m/s² b. 6t m/s c. 6t² m/s² E. Other: d. (-41.89, 2.85) d. 6.46m What is the average velocity of the tiger between the interval 3 seconds and 2 seconds? a. 15 m/s. b. 27 m/s c. 42 m/s d. 50 m/s E. Other: d. 3t2 m/s2
College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Answer the following problems and explain your answers for better understanding.
Transcribed Image Text:36.
How much force must act on 1,800 kg car to give it an acceleration of 0.50 m/s²?
a. 180N
b. 360N
c. 720N
37.
What are the direction of the arrow for velocity and acceleration when the ball is thrown downward?
a. Its velocity and its acceleration both points upward.
b. Its velocity and its acceleration both points downward.
38.
c. Its velocity points downward and its acceleration points upward.
d. Its velocity points upward and its acceleration points downward.
A sack of rice with a mass of 50 kg is pulled across a floor. It requires a force of 150 N to move the sack
What is the acceleration of the object?
a. 0 m/s²
b. 1 m/s²
c. 2 m/s²
d. 3 m/s²
39. A batter hits a baseball so that it leaves the bat at speed v = 21.0 m/s at an angle theta =
48.2°.
What is the position of the ball at t = 3s?
a. (-41.99, 2.86)
b. (41.99, 2.86)
What is the height h at this time?
a. 6.49m
b. 6.48m
40.
x = 15m + (3.0m/s²) t²
What is the displacement of the tiger at 2 seconds?
a. 27 m
b. 28 m
E. Other:
c. (41.89, 2.85)
c. 29 m.
d. 900N
c. 6.47m
A tiger is crouched 15 m to the east of a tree. At time t=0 the tiger begins to run due east toward
a goat that is 60 m to the east of the tree. During the first three seconds of the attack, the tigers
coordinate x varies with time according to the equation
d. 30 m
How will you represent the equation for instantaneous velocity?
a. 6t m/s²
b. 6t m/s
c. 6t² m/s²
E. Other:
d. (-41.89, 2.85)
d. 6.46m
What is the average velocity of the tiger between the interval 3 seconds and 2 seconds?
a. 15 m/s.
b. 27 m/s
c. 42 m/s
d. 50 m/s
E. Other:
d. 3t2 m/s2
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