A body falls vertically from the height h = 45 metres with its initial velocity equal to zero. What time will it take the body to travel the last 5 metres? Disregard the resistance of the air. g = 10 m⁄ S2.
Q: The position of a body at time t sec is s=t3−6t2+9t m. Find the body's acceleration each time the…
A: Differentiate the function of the position to obtain the function of the velocity.
Q: An apple is dropped from a tree limb 4.5 m above the ground. What speed would it have when it is…
A: Height of tree H=4.5 m above the ground. We want to calculate the speed of apple when it is halfway…
Q: A stone is thrown with an inffial speed of 11.0 m/s at an angle of 55.0 above the horizontal from…
A: Given:The intial speed of the object is 11 m/s.The angle of the projection is 55o.The height of the…
Q: The known elevations of the ski jumping hill shown below are as follows: hB = 2.0 m hC = 7.0 m If…
A: Given data : hC = 7.0 m Velocity at position C (Vc) = 25.4 m/s Velocity at position A (VA) = 0 m/s
Q: A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x0. The…
A:
Q: A projectile is fired horizontally into a resisting medium with a velocity vo = 3.2 m/s and the…
A: Given Data: Velocity v0=3.2ms Deceleration cvn=cv5 from this expression n=5 c=0.022m-4s-3 Time…
Q: A baseball player throws a ball into the air with an initial speed of 27 m/s [up]. Ignore air…
A: The point of launch of ball is taken as origin, upward direction is positive and downward direction…
Q: A water balloon is thrown straight down with an initial speed of 12.0 m/s from a second floor…
A: Given data: Initial velocity (u) = 12.0 m/s, downward Height (h) = 5.00 m Air resistance is…
Q: A skydiver jumps from an airplane where the resistance he encountered is proportional to its…
A: Altitude of the skydiver at the moment he opens his parachute. Given, First limiting velocityv1=10…
Q: A ball is thrown directly upward from an initial position of 2.11m above the ground. The ball…
A:
Q: The known elevations of the ski jumping hill shown below are as follows: hg = 2.4 m hc = 6.1 m If a…
A: The elevation of the ski jumping hill at position A is denoted by hA. The elevation of the ski…
Q: The known elevations of the ski jumping hill shown below are as follows: hB = 1.5 m hC = 7.5 m If…
A:
Q: A rock is thrown from a bridge 19.5 m above water with an initial speed of 17 m/s. Assuming…
A: According to the law of conservation of energy,
Q: a paratrooper survived a training jump from 1200 ft when his parachute failed to open but provided…
A: We may use the equations of motion for an item falling under the influence of air resistance to get…
Q: A ball is thrown straight up with an initial speed of 36 m/sm/s. Find its time in the air. Find the…
A: Given data The initial speed of the ball is given as u = 36 m/s. The time to reach the maximum…
Q: Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of…
A: Given,
Q: Neglecting friction and air resistance, a car with an initial velocity of 76.5 km/h coasts up a hill…
A: given initial velocity of car =vi= 76.5 km/h = 21.25 m/s final velocity of…
Q: Calculate the maximum height it reaches and the velocity of the projectile when it hits the ground…
A: You can assume mass = m , as it was not mentioned, for ymax it should be 1 according to answer ,…
Q: You throw a ball straight up from the edge of a cliff. It leavesyour hand moving at 12.0 m>s. Air…
A: Given: Initial velocity(u) = 12 m/s To determine: The ball’s position and velocity 2.60 s after it…
Q: A stunt man hangs from the bottom of an elevator that is rising at a steady rate of 1.10 m/s. At…
A:
Q: The acceleration on a falling tennis ball is not constant due to air resistance. The time…
A:
Q: You drop a stone down a well that is 7.26m deep. How long is it before you hear the splash? The…
A: Given Depth of the well = 7.26 m Speed of the sound = 316.4 m/s Air resistance is negligible To…
Q: a paratrooper survived a training jump from 1200 ft when his parachute failed to open but provided…
A: We may use the equations of motion for an item falling under the influence of air resistance to get…
A body falls vertically from the height h = 45 metres with its initial
velocity equal to zero. What time will it take the body to travel the
last 5 metres? Disregard the resistance of the air. g = 10 m⁄ S2.
Step by step
Solved in 5 steps with 5 images
- A man steps outside one winter day to go to work. His icydriveway is 8.0 m long from top to mailbox, and it slopes downwardat 20° from the horizontal. He sets his briefcase on theice at the top while opening the garage, and the briefcase slidesdown the driveway. Ignore friction. (a) What is its acceleration?(b) How many seconds does it take to get halfway to the mailbox?(c) How many seconds does it take to reach the mailbox?(d) What is its speed at the instant it reaches the mailbox?In archer fires in hero straight up into the air with a speed va= 25 m/s. Neglect air resistance. Find the maximum height h reached by the arrow in meters. Write an expression for the time the arrow is in the air until it returns to launch height in terms of known quantities.If a 1.3 kg ball is dropped from the top of a 33.7 meter tall building, what is the maximum velocity of the ball just before it hits the ground?
- A child on a toboggan sits at rest on the top of a tobogganing hill. If the child travels 70.0 m [downhill] in 5.3 s while accelerating uniformly, what acceleration does the child experience?A basketball referee tosses the ball straight up for the starting tip-off. What is the minimum velocity that the basketball player must jump in order to rise 1.50 m above the floor and reach the ball?A 10kg projectile is fired vertically upward from the ground. with an initial velocity of 50m/s. Determine the maximum height to which it will travel if atmospheric resistance is neglected. O 127.42m O 150.23m 148.77m O 112.23m
- A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d = 2.67m, and x and y are measured in meters as usual. Suppose the block starts on the track at x = 0. What minimum initial velocity (moving to the right) must the block have such that it will leave the track at x = 0 and go into freefall? 7.24 m/s 5.12 m/s 9.89 m/s 9.01 m/sA physics book slides off a horizontal table top with a speed of 1.10 m/s. It strikes the floor after a time of 0.480 s. Ignore air resistance. Find the horizontal distance from the edge of the table to the point where the book strikes the floor.A 40 N boulder and a 2 N rock are dropped at the same time, from the same height, from rest. Ignoring air resistance, which object hits the ground first?
- Suppose hemoglobin and DNA are diffusing in water. A small amount of each is released simultaneously. How much time (in s) passes before the hemoglobin is 4.50 s ahead of the DNA? Such differences in arrival times are used as an analytical tool in gas chromatography. X SIn the presence of friction, the descending velocity v of the particle is determined as follows. mxdv/dt = mg-yv ap m =mg -yv dt (a) Predict v through dimensional analysis. (b) Solve the differential equation directly and compare it with the dimensional analysis. please. help...