4. A stone is thrown vertically upwards at 24.5 m./sec. from a point on the level with but just beyond a cliff ledge. Its height above the ledge t sec. later is 4.9t (5-t) m. . If its velocity is v m./sec. differentiate to find v in terms oft : i) when is the stone at the ledge level ? ii) find its height and velocity after 1, 2,3, and 6 sec.. iii) what meaning is attached to negative value of s ? a negative value of v ?

Q: Name: Period: 4. An object is shot 50 m/s at an angle of 70°. How high does it go? A. Use…

A: The time period of the object shot at the height is, t=v0sinθg=50 m/ssin70°9.8 m/s2=4.8 s (A) The x…

Q: 4. You attach a meter stick to an oak tree, such that the top of the meter stick is 2.27 meters…

A: Given The top of the meter stick from the ground is h1=2.27 m. The time is taken by Acron to cover…

Q: 1. Two divers jump from a 4.00-m platform. One jumps upward at 2.40 m/s and the second steps off the…

A: Given that : Height (h) = 4 meters Initial Velocity of first diver v0 = 2.40 m/sec Initial Velocity…

Q: A toy rocket launcher launches a heavy ball from level ground to a peak height of 350 m. What is the…

A:

Q: A soft tennis ball is droppped onto a hard floor from a haight of 1.25m and rebounds to a height of…

A:

Q: An arrow is shot upward from the top of a 740 ft building with an initial velocity of 68 ft/s. 1.…

A:

Q: Calculate the displacement and velocity at time 1.04s for a rock thrown straight down with an…

A: Given Data:- Height of the roadway bridge from the building is h=70.0 m Initial velocity of the rock…

Q: A ball is thrown with an initial speed of 19 m/s at an angle 70 degrees to the horizontal. Calculate…

A:

Q: 7. A ball is thrown vertically downward from the edge of a bridge 29.0 m high with an initial speed…

A:

Q: An airplane heads due north at 120 m/s through a 30 m/s cross wind blowing from east to west. The…

A: Write the velocity components for the plane. Write the velocity components for the wind.

Q: A ball is dropped from a height of 10.3m. How long will it take for the ball to hit the ground? t=…

A:

Q: 3. A ball is hit from the ground with a speed of 30. m/s, at an angle of 40. degrees up from the…

A:

Q: a) Consider a Yunner moving in the positive direchon with on inhol velocity 8f Gmls slow down ot a…

A: Acceleration is known as the rate of change of velocity and velocity is known as the rate of change…

Q: IUXTE A ball dropped from a helicopter takes 1.6 s to fall the final 35 m. From what height was it…

A:

Q: 4. A ball rolls off a 1.0 m high table and lands on the floor from the table. How long is the ball…

A: Newton's second equation of motion in the vertical direction is h=ut-12gt2 Here h is height, u is…

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.