7.) A football is kicked directly upward with a velocity of 50 m/s. Determine: a. The velocity at 2 s. (30 m/s) b. The velocity at 6 s. (-10 m/s) c. The acceleration at 3 s. (-10 m/s?) d. The velocity at 5 s (0 m/s)
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A: The Law of inertia i.e., Newton’s First Law of Motion supports the above explanation.
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- III. An object is thrown up from the ground and reaches a height of 100 m after 4 seconds. (Use -10 m/s² for acceleration due to gravity.) 8. What was the initial velocity given to the the object? 9. What is the maximum height that the object will reach? (Round your answer to the nearest whole number of meters.) 10. At what time will the object be at 70 m on the way down?III. An object is thrown up from the ground and reaches a height of 100 m after 4 seconds. (Use -10 m/s² for acceleration due to gravity.) 8. What was the initial velocity given to the the obi 9. What is the maximum height that the object will reach? (Round your answer to the nearest whole number of meters.) 10. At what time will the object be at 70 m on the way down?5. a stone is thrown vertically upwards with an initial velocity of 100km/ hr.A.) what is the velocity if it reaches a height of 10m as it goes up?B.) if it caught on its way down 5m above the ground, what is the velocity?.
- 2. A football is kicked upward with a speed of 35 m/s from the top of a 70m building. Find: a. The time when it reaches the highest point. b. The time it takes to reach the ground. c. Its velocity when it hits the ground3. A box is dropped from a hot air balloon that is 300 ft above the ground and rising at 13 ft/s. Neglecting air resistance for the box, determine the following: a. the maximum height reached b. the position and the velocity 5 s after it was released c. the time at which it hits the ground.3. You throw a ball vertically upward from a height of 2 meters with an initial velocity of 10 meters per second. Use the idea that acceleration due to gravity (neglecting air resistance) is -32 feet/sec?, which is the same as -9.8 meters/sec2. a. What is the maximum height the ball will reach? Round your answer to the nearest meter, if necessary.
- 3. An object is thrown vertically upward. It has a speed of 40 ft/s when it has reached one-half its maximum height. a) How high does it rise? b) What is its velocity 2 sec. after it is thrown? c) How long will it rise to its highest point?3. A car accelerates for one minute from rest to the speed of 100 m/s. If acceleration is assumed to be constant, what is the acceleration of the car in m/s^2 at 20 seconds from the time it started to move? * a. 1.7 m/s^2 b. 5 m/s^2 c. 50 m/s^2 d. 100 m/s^2 e. None of the aboveA ball is dropped from a window 50 m above the ground. a) How long does it take the ball to reach theground?b) What is its final velocity?2. A pebble was dropped from the window of a building, 80 meters above the ground. a) How many seconds willit take the pebble to reach the ground? b) How fast is it after 2.0 seconds? c) When will its velocity be 25 m/s?3. A stone is tossed upward at the moment a ball is dropped from a height of 25 meters. The stone’s initialvelocity is 25 m/s. At what height will the two meet? In how many seconds.4. A ball is thrown downward with an initial velocity of 20 ft/s. a) How fast is it moving 2s later? b) How fardoes it fall in these time ?
- 1. A car, initially moving at 1m/s, has a constant acceleration of 2m/s. After 10 seconds, what will its velocity be? Solve for the distance travelled by the car during this time interval. 2. A cheetah can accelerate from rest to 24m/s in 2 seconds. What is its acceleration? 3. A ball with an initial speed of 3.2m/s travels 6 meters before stopping. Solve for its acceleration. 4. A penny is dropped from the observation deck of the Empire State building (381 meters above the ground.) How long does it take to reach the ground? 5. A ball is dropped from the leaning tower of Pisa which is 55-meter high. How long does it take to reach the ground?3. A car decelerates by constantly reducing 3 m/s per second of its velocity in a span of 10 seconds. For this duration, its average velocity is 30 ft/s. Find its instantaneous velocity at: a. the beginning of the 10-second duration. b. the end of the 10-second duration. m/s m/s14. A sprinter accelerates at 2.5 m/s^2 for the first 4 s of a 100 m race, then keeps going at steady pace. What is her top speed? a. 5 m/s b. 7.5 m/s c. 10 m/s d. 12 m/s e. None of the above