Tom and Jerry are running forward at the same speed. They are following a rubber ball at a constant speed v as seen by the thrower. According to Sam, who’s standing on the ground, the speed of the ball is ____________ a) Same as v b) Greater than v c) Less than v d) Zero
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Tom and Jerry are running forward at the same speed. They are following a rubber ball at a constant speed v as seen by the thrower. According to Sam, who’s standing on the ground, the speed of the ball is ____________
a) Same as v
b) Greater than v
c) Less than v
d) Zero
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- 1) The motions of a car and a motorbike along a straight road are described by the velocity vs time graph provided below. The two vehicles are initially alongside each other at time t=0 s. The motorbike’s speed is 18.1 m/s and the time T is 59.9 s. a) what distance has the motorbike travelled between 0 and T (in km)? b) What distance has the car traveled between 0 and T (in km)? 2) Which of these statements is true? a. At T, the car and motorbike are at the same location. b. the acceleration of the car is constant between 0 and T c. the acceleration of the motorbike is 0 d. the acceleration of the car is 0 3) a)What is the car's average speed for the first T seconds? (in m/s) b) What is the motorbike's average speed for the first T seconds (in m/s)14. You are running north at 5.90ms. Let’s call you Jogger A. Jogger B is currently ahead of you and is also jogging north at 1.88ms. From your frame of reference, what is the speed and direction of Jogger B?Assume that north is in the positive direction and south is in the negative direction. −4.02ms −7.41ms −1.29ms −5.47ms None of these is correct.A ball is thrown up with an initial speed of 43.0 m/s a) what is the ball's speed at its highest position? b) how long does it take the ball to reach its highest position? c) what is the magnitude of the ball"s acceleration at its highest position? d) what is the distance between the initial and highest position of the ball? e) what is the ball's speed when it comes back to its initial position?
- A boat moves across a river. The river's velocity relative to the land is VRI , and the boat's velocity relative to the river is VBR . Which of the following represents the velocity of the boat relative to the land. vBR + vRL B THa – HHa vBR + URL | 79a| + |#a|You travel from point A to point B in a car moving at a constant speed of 70 km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90 km/h. Is your average speed for the entire trip from A to C 80 km/h? Explain why or why not.3. The graph below shows the displacement vs time of a student leaving the NSCI 110 after physics class walking towards the cafeteria for lunch (assume a 1-D motion) At some point between NSCI 110 and the cafeteria, the student realizes they have left their cell phone in the classroom, so they turn back to get it. Displacement vs Time 120 100 nol Velocity vs Time 80 1.5 60 40 30 60 90 120 150 180 210 20 -1.5 30 60 90 120 150 180 210 Time (s) a. How far did the student walk before realizing that they left their cell phone in the classroom? How long did this take? (2 marks) b. With what velocity did the student walk back to the classroom? (2 marks) c. Fill out the velocity vs time graph above. (2 marks) Distance (m)
- A distance of 60 meters separates two jetskis at Virginia Beach. Starting at rest, the jetskis accelerate at a constant rate of 0.2 m/s2 towards each other.Starting at a midpoint between the two jetskis, a porpoise is seen swimming from one jetski to the other at a constant speed of 16 m/s. The porpoise continues swimming back and forth between the jetskis until they crash together.a) What is the total distance the porpoise travelled? b) what is the speed of the jetskis when they crash together?1. Suppose that the velocity of a particle in motion is given by v(t) = 44t² +²+1 feet per second, where t is in seconds from now. Find the position of the particle after 5 seconds.Question 4-a. Numerical: A river flows east at 3.0 m/s. A boat travels between two cities 3000-m apart by maintaining a constant velocity of 15 m/s relative to the water downstream the river. What is the ground speed of the boat measured in m/s?
- The position of an object moving along the x -axis is given by x = 5.0m 4.0 t m + 2.0 t² m. How many times does this object pass through the point x=0? A. twice, first moving in the positive x-direction, then moving in the negative x-direction B. twice, first moving in the negative x-direction, then moving in the positive x-direction C. only once, moving in the positive x-direction D. only once, moving in the negative x-direction E. neverCan I please get some help with this problem. I can't seem to figure this out. thank you!What is the discrepancy of v1 and v2 v1=688.8 V2= 613.99