A 20 N stone is thrown vertically upward from the ground. It is observed that, when it is 15 m above the ground, it travels with a velocity of 25 m / s upwards. What will its speed be when it is thrown? A) 30.31 m/s B) 15.16 m/s C) 18.19 m/s D) 319 m/s

Use the following information to answer the next two questions The year is 1927. You are a crime scene investigator. You are considering pressing reckless driving charges against the driver of Car 2. To do this, you must find the speed of Car 2 before the crash. Allegedly, Car 1 was parked, when Car 2 crashed into it. Using the skid pattern, you determine that the speed of the two joined vehicles was 17 m/s immediately following the impact. Car 1 has mass of 1800 kg and Car 2 has a mass of 1100 kg.

3. A boulder rolls over a 50m high cliff. How fast was the boulder moving if it was found 180 m on the ground? At what time did the boulder hit the ground? At what velocity was it approaching the ground?

A golf ball is hit and leaves the ground with a speed of 35.0 m/s. If its speed is 23.0 m/s when it reaches the peak of its path, what is the maximum height that it reaches? Ignore air resistance. А. 27.25 m D. 32.39 m В. 35.51 m Е. 43.22 m С. 38.43 m F. 36.84 m

QUESTION 2 A ball is thrown straight up in the air. When it reaches a height that is n times smaller than the maximum height it can reach, its speed is v. Calculate the maximum height, in meters. n = 3.9 v = 16.8 m/s to saue all answers.

A particle starts from rest and accelerates as shown in the figure below. az (m/s²) 1 15 20 (s) 7 " 5 10 -1 -2 -3 (a) Determine the particle's speed at t = 10.0 s. m/s Determine the particle's speed at t = 20.0 s? m/s (b) Determine the distance traveled in the first 20.0 s. (Enter your answer to one decimal places.)

You shoot a ball straight up with an initial speed of 8490 m/s. When the surface of the earth, what is the speed of the ball? O 2146 m/s reaches a height of 4.0 x 10 6 m above O 2956 m/s O 3546 m/s 4009 m/s 4588 m/s O 4876 m/s

A particle starts from rest and accelerates as shown in the figure below. az (m/s²) 1 t (s) 10 15 20 -1 -2 -3 (a) Determine the particle's speed at t = 10.0 s. m/s Determine the particle's speed att = 20.0 s? m/s (b) Determine the distance traveled in the first 20.0 s. (Enter your answer to one decimal places.) m

If you throw up a ball, after 4 seconds it return back to your hands, what is the height of this ball from your hands to the highest position. (Assume g=10m.s-²) 18 O 15 metres O 20 metres O 25 metres 30 metres Vo h

2. An object of mass 200 g (0.2 kg) is thrown vertically upwards with a velocity of 8 m/s from a height of 10 m above the ground. It reaches certain maximum height and falls straight back to ground. Ignore air resistance in this problem. (a) Draw v-t graph that represents the velocity of the object after it is launched upwards and until it hits the ground. (b) How long does it take for the object to reach the maximum height? (c) What is the maximum height of the object from the ground? (d) How long does it take for the object to reach the ground from the highest point of motion? (e) What is the velocity of the object as it reaches ground? (Hint: Not zero).