1 D A particle P is projected from a point A with speed u m s–1 at an angle of elevation , where cos = 5 4. The point B, on horizontal ground, is vertically below A and AB = 45 m. After projection, P moves freely under gravity passing through point C, 30 m above the ground, before striking the ground at the point D, as shown in Figure 3.
10. A car travels with a uniform velocity of 20 m-1.The driver applies the brakes and the car comes to rest in 10 second. Calculate the retardation. (S) (a = - 2 ms-2) 11. A ball is thrown vertically upwards, At highest point of its path what will be its instantaneous velocity & acceleration. (U) 12.
A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does it take to hit the ground after it ...
The ball rises to a height of 3.3 m above the ground, or 3.3 m above the y = 0 position. You also have information about velocity at this point. You know that gravity causes an object to slow down as it moves upward and speed up as it moves downward.
A ball is thrown vertically upward with a speed of 25.0m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the level from which it started? Solution . Problem 23.
500 kg ms 1, so final momentum of 80 kg skater — 540 kg ms 1. Final velocity = 540/80 = 6.75 ms Two skaters are skating together at a steady velocity of 8 m s-1. Their masses are 80 kg and 50 kg. The lighter skater is pushed forwards and accelerates to 10 ms-I. Calculate the new speed of her partner. (10 min)
A ball is thrown upwards from the ground with an initial speed of u. The ball is at a height of 80 m at two times. The time interval being 6 sec. Find u.
1) When a ball is thrown up and it comes down When the ball leaves the hand, there is no upward force acting on the ball. The only force acting on the ball is its weight. This net force is opposite to the motion of the ball, hence causing the ball to decelerates. Refer to this post for the explanation (comics)
1. An object is projected vertically upwards at time t = 0. Air resistance is negligible. The object passes the same point above its ... A ball of mass m is thrown with an initial speed of u at an angle θ to the horizontal as shown. Q is the highest point of the motion. ... of 16 ms and leaves the container at a speed of 20 m s .