Three swimmers start from the blocks at the same time. They all leave the starting block...
Three swimmers start from the blocks at the same time. They all leave the starting block 1.6 m above the water. The vertical velocity at take off for every swimmer is 0 m/s (a completely horizontal projection), the horizontal velocities are 5 m/s for swimmer A, 7.5 m/s for swimmer B, and 10 m/s for swimmer C; how long does it take each one to reach the water?
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Three swimmers start from the blocks at the same time. They all
leave the starting block...
three swimmers start from the blocks at the same time. They all leave the starting block...
three swimmers start from the blocks at the same time. They all leave the starting block 1.6m above the water. the vertical velocity at take off for every swimmer is 0m/s (a completely horizontal projection), the horizontal velocities are: swimmer A: 5 m/s swimmer B: 7.5 m/s swimmer C: 10 m/s How long does is take for each one to reach the water?
A 0.014 kg bullet traveling horizontally at 403 m/s strikes a 4 kg block of wood...
A 0.014 kg bullet traveling horizontally at 403 m/s strikes a 4 kg block of wood sitting at the very edge of a horizontal table of height 1 meters. The bullet is lodged into the wood. [For the signs of directions in this problem, take forward and upward to be positive; backward and down to be negative.] a) What is the momentum of the bullet right before it impacts the block of wood? b) What is the momentum of the...
15) During an equestrian show jumping competition, a rider and her horse need to jump over...
15) During an equestrian show jumping competition, a rider and her horse need to jump over a fence that is 1.5 m tall. They take off from the ground with a horizontal velocity of 6.2 m/s and a vertical velocity of 2.5 m/s, giving them a projection speed of 6.7 m/s and a projection angle of 22°. The center of mass of the horse and rider is 1.94 m above the ground at the instant of takeoff, and for a...
Two blocks are positioned on surfaces, each inclined at the same angle 45.6 degrees with respect...
Two blocks are positioned on surfaces, each inclined at the same angle 45.6 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines, so the blocks can slide together. The mass of the black block is 4.10kg and the coefficient of kinetic friction for both blocks and inclines is μk 0.370. Assume static friction has been overcome and that everything can slide. A) What must...
A swimmer dives from a diving board 15.0 m above the water's surface. his initial velocity...
A swimmer dives from a diving board 15.0 m above the water's surface. his initial velocity is 2.10 m/s at an angle of 32.0 degrees above the horizontal. a) How long does it take him to hit the water? b) When he hits the water, what is the magnitude of his displacement from the diving board? Thank you!
What is the divers speed at the start of her drive? (Hint: It is the same...
What is the divers speed at the start of her drive? (Hint: It is
the same as when she passes the high board)
The diver jumps off the high board a second time with the same
speed, but this time she jumps at an angle 70 degrees at an angle
from the horizontal.
What is the divers velocity as she hits the water this time?
You are evaluating the safety of a high school athletic diving program. Safety analysis has...
A projectile is launched with an initial speed of 40 m/s at an angle of 25°...
A projectile is launched with an initial speed of 40 m/s at an angle of 25° above the horizontal. (a) What are the horizontal and the vertical components of initial velocity. (b) Find the time taken by the projectile to reach the highest point and its height at the highest point. (c) How long does it take the projectile to hit the ground after launch and how far from the starting point it hits the ground. (d) Calculate the velocity...
1. A block of mass m = 0.23 kg slides with initial velocityv0 = 1.4...
1. A block of mass m = 0.23 kg slides with initial velocity
v0 = 1.4 m/s along a frictionless surface (as in the
figure). The block next slides through a region of length d = 0.25
m with kinetic friction. After passing through the friction region,
the block slides up a curved ramp until momentarily coming to rest
at a height h above the level surface. If the kinetic friction
coefficient μ k = 0.204, what height h does...
2. A water balloon is thrown upward from a window 25 m above the ground and...
2. A water balloon is thrown upward from a window 25 m above the ground and hits the ground 2.95 s later. What's the maximum height above the window that the balloon reaches? a) 3.77 m b) 2.59 m c) 2.21 m d ) 1.82 m e) 1.17 m 400 m 3. A student who can swim with a speed of 2.5 m/s in still water wants to get to the other side of a 400 m wide river whose...
Part 1) A small block travels up a frictionless incline that is at an angle of...
Part 1) A small block travels up a frictionless incline that is at an angle of 30.0°above the horizontal. The block has speed 4.26 m/s at the bottom of the incline. Assume g = 9.80 m/s2. How far up the incline (measured parallel to the surface of the incline) does the block travel before it starts to slide back down? Part 2) Complete the following exercises. (Assume g = 9.80 m/s2.) (a) A small block is released from rest at...
15) During an equestrian show jumping competition, a rider and her horse need to jump over a fence that is 1.5 m tall. They take off from the ground with a horizontal velocity of 6.2 m/s and a vertical velocity of 2.5 m/s, giving them a projection speed of 6.7 m/s and a projection angle of 22°. The center of mass of the horse and rider is 1.94 m above the ground at the instant of takeoff, and for a...
What is the divers speed at the start of her drive? (Hint: It is
the same as when she passes the high board)
The diver jumps off the high board a second time with the same
speed, but this time she jumps at an angle 70 degrees at an angle
from the horizontal.
What is the divers velocity as she hits the water this time?
You are evaluating the safety of a high school athletic diving program. Safety analysis has...
1. A block of mass m = 0.23 kg slides with initial velocity
v0 = 1.4 m/s along a frictionless surface (as in the
figure). The block next slides through a region of length d = 0.25
m with kinetic friction. After passing through the friction region,
the block slides up a curved ramp until momentarily coming to rest
at a height h above the level surface. If the kinetic friction
coefficient μ k = 0.204, what height h does...
2. A water balloon is thrown upward from a window 25 m above the ground and hits the ground 2.95 s later. What's the maximum height above the window that the balloon reaches? a) 3.77 m b) 2.59 m c) 2.21 m d ) 1.82 m e) 1.17 m 400 m 3. A student who can swim with a speed of 2.5 m/s in still water wants to get to the other side of a 400 m wide river whose...
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