An object is dropped from a bridge. A second object is thrown downwards 1.00 s later. They both reach the water 20.0 m below at the same instant. What was the initial speed of the second object?
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- You toss a stone straight up and it comes back down in a total time of 6 S. what is the speed of the stone when it comes back to the same hight from where you tossed it. Ignore air resistance. O10 m/s O 30 m/s 100 m/s O 20 m/sAn object is thrown upward. 4.0 s later it has a velocity of -3.0 m/s. At what velocity was it thrown upwards? What is the maximum height it will reach?Hi here's a question on physics.
- A ball is dropped from rest from the top of a building. Two motion detectors which are positioned outside of two different windows, one above the other, record the velocities of -15.5 m/s and -17.2 m/s as the ball goes past them. (no air resistance) what is the second motion sensor measure the time it takes for the ball to hit the ground after passing it as 3.50 seconds, how tall is the building?A single-engine air plain starts its engine at one end of the runway. It accelerates at a constant rate and takes off at 38 m/s after 20 seconds on the runway, just as it is running out of runway. How long is the runway? Your Answer:A student releases a marble from the top of a 160cm ramp. The marble increases speed steadily and reaches the bottom of the ramp in 2.70s. a)What was the magnitude of the marble's acceleration? b)What was the marble's final speed?
- You are standing on a circular track that is 315 m long. You begin jogging at the start line and keep jogging until you complete one full lap and stop at the same point you started at. - What is the total distance you travel? - What is your final displacement? A world class sprinter ran 200 m in 21.75s. What was her average speed? (m/s)You drop a rock straight down into a well and hear the sound of the hitting the water 7.0 s later. If the speedof sound is 340 m/s, how deep is the well?Speedy Sue, driving at 32.0 m/s, enters a one-lane tunnel. She then observes a slow-moving van 165 m ahead traveling at 5.30 m/s. Sue applies her brakes but can accelerate only at -1.30 m/s² because the road is wet. Will there be a collision? Yes O No If yes, determine how far into the tunnel and at what time the collision occurs. If no, determine the distance of closest approach between Sue's car and the van. (If no, enter "0" for the time.) distance time Need Help? m Read It
- A certain freely falling object, released from rest, requires 1.25 s to travel the last 25.0 m before it hits the ground. (a) Find the velocity of the object when it is 25.0 m above the ground. (Indicate the direction with the sign of your answer. Let the positive direction be upward.) m/s (b) Find the total distance the object travels during the fall. mA ball is tossed straight up from the ground. If it reaches the height of your bedroom window (2.0 m) and then falls straight back down to the ground, (g= 9.8 m/s?; Ignore air resistance and use at least 2 significant figures.) 1. What was its initial velocity? 2. How long is the ball in the air?A lead ball is dropped in a lake from a diving board 3.50 m above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. It reaches the bottom 4.40 s after it is dropped. How deep is the lake?