MCQ 2. If C-[10 m, 30°] and D= [25 m, 130°], what is the magnitude of the sum of a. 20 m b. 35 m c. 15 m d. 25 m e. 50 m ese
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![MCQ 2. If C- [10 m, 30°] and D= [25 m, 130°], what is the magnitude of the sum of these two vectors?
a. 20 m
b. 35 m
c. 15 m
d. 25 m
e. 50 m](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffb10e998-1c95-4c7a-84f6-d98ef9a248bb%2Ff4a5e8c4-9e45-4e3b-9140-02654cdfb707%2Fk99a4ka_processed.jpeg&w=3840&q=75)
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- 1. Suppose A=2.0 N at 20° and B = 1.5 N at 80°. Sketch and label à , B and -B. Recall that "-B" has the same magnitude but opposite direction of"B". a. b. Sketch the sum Å+(-B) using the head-to-tail method. Use the component method to calculate the magnitude and direction of A-B. C.Prove that the photoelectric effect cannot occur with a completely free electron, that is, one not bound to an atom. (Hint: Consider the reference frame in which the total momentum if the electron and the incident photon is zero.)A physics student measures the depth of a deep hole by dropping a rock into the hole. The rock takes 5 seconds to hit the bottom. Assuming g = 10 m/s2, the depth of the hole is approximately: %3D A. 25 meters B. 50 meters C. 100 meters D. 125 meters E. 200 meters
- An object moves along the xy-plane. At some instant, its velocity and acceleration are - (3 m/s) } , ā = (0.5 m/s²) î – (0.2 m/s²) j. At this instant, the object is 7. = A. speeding up and following a curved path. B. speeding up and moving in a straight line. C. slowing down and following a curved path. D. slowing down and moving in a straight line. E. none of these.10. Ā = -2â + -3ŷ and B = -4â + -4ŷ. Calculate R = Ã+B. Calculate 0, the direction of R. Recall that 0 is defined as the angle with respect to the +x-axis. A. 49.4° B. 130.6° C. 229.4° D. 310.6°4. A plane traveling at 192 km/h [N] is blown eastward by the wind with a speed of 56.0 km/h. What is the velocity of the plane with respect to the ground? a. 1.36 x102 km/h [E 16.3o S]b. 2.00x102 km/h [N 16.3o E]c. 2.00x102 km/h [N 73.7o E]d. 2.48x102 km/h [E 73.7o S]e. 1.36 x102 km/h [N 73.7o E]
- M2 120" If 01 in the figure = 55°, how about 02? 65° 35° 55° 45°3. The motion of a particle is given by the equations = 2t* -+2t. Solve for the values of velocity (v) and acceleration(a) when t= 2sec. Express velocity in ft/s and acceleration in ft/s². %3DA stone is thrown into a body of still water and created ripples in the form of concentric circles. If the radius increases at a rate of 2 m/s, at what rate is the area increasing when the radius is 2m? Group of answer choices a. 4 pi b. 8 pi c. 12 pi d. 6 pi
- A object is moving from ground at 70 meter per second and an angle of 75 degrees from horizontal. what is the horizontal dispalcement when the object reaches the ground? a. 226 m b. 154 m c. 250 m d. 125 m e. 233 mWhich of the following unit equations is correct? Select one: O a. N-C = V/m O b. N/m V/C %3D O c. N/V = m/C O d. N-m V-C O e. N-V = N-mAn automobile is going around a circle with a constant speed of 25mph. Choose the correct statement . Choose all that apply. a. Velocity is changing.(not constant) b. Automobile is accelerating . c. Velocity of the automobile is constant. d. Acceleration of the automobile is zero.