A dog and a sledge are on the frictionless ice of a frozen lake, 11.6 m apart but connected by a rope of negligible mass. The dog exerts a certain horizontal force (N) on the rope. If magnitudes of the sledge and the dog accelerations are o.8 m/s and o.2 m/s2, respectively. How far from the dog's initial position (m) do they meet?
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- a person in kayak atarts padding, and it accelarates from 0 to 0.474 m/s in a distance of 0.584 m. if the combined mass of the person and the kayak is 69.9kg, what is the magnitude of the net force acting on the kayak?As a fish jumps vertically out of the water, assume thatonly two significant forces act on it: an upward force F exertedby the tail fin and the downward force due to gravity. A recordChinook salmon has a length of 1.50 m and a mass of 61.0 kg.If this fish is moving upward at 3.00 m/s as its head first breaksthe surface and has an upward speed of 6.00 m/s after twothirdsof its length has left the surface, assume constant accelerationand determine (a) the salmon’s acceleration and (b)the magnitude of the force F during this interval.A dog and a sledge are on the frictionless ice of a frozen lake, 14.4 m apart but connected by a rope of negligible mass. The dog exerts a certain horizontal force (N) on the rope. If magnitudes of the sledge and the dog accelerations are 0.5 m/s² and 0.1 m/s?, respectively. How far from the dog's initial position (m) do they meet?
- In the following figure, the horizontal surface onwhich this block slides is frictionless. If the two forcesacting on it each have magnitude F = 30.0 N andM = 10.0 kg , what is the magnitude of the resultingacceleration of the block?Paleontologists estimate that if a Tyrannosaurus rex had tripped and fallen, the ground would have exerted anormal force of approximately 260,000 N on its torso as it landed.Assuming the torso has a mass of 3800 kg, (a) find the magnitudeof the torso’s upward acceleration as it comes to rest. (For comparison, humans lose consciousness with an acceleration of about 7g.)(b) Assuming the torso of a T. rex is in free fall for a distance of 1.46m as it falls to the ground, how much time is required for the torsoto come to rest once it contacts the ground?Two constant forces of magnitudes F1 and F2, act on a particle of mass 5.00 [kg] which is at rest at the origin. The force F1 points at 14.5° west of north, while the force F2, points at 58.3° west of south. Due to the two forces, the particle accelerates and is later located at 32.4 [m], 17.0° north of west with speed 12.2 [m/s]. What is F1?
- A large cruise ship of mass 6.70 ✕ 107 kg has a speed of 12.4 m/s at some instant. What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.90 km?What net external force is exerted on a 1100-kg artillery shell fired from a battleship if the shell is accelerated at 2.40×104 m/s2? What is the magnitude of the force exerted on the ship by the artillery shell?Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg, a) just after it is dropped from the window of a stationary train, b) just after it is dropped from the window of a train running at a constant velocity of 36 km/h,
- A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 80without pedaling or braking. The bicyclist has a frontal area of 0.45 m2and a dragcoefficient of 1.1 in the upright position, and a frontal area of 0.4 m2and a dragcoefficient of 0.9 in a racing position. If the downhill speed of the bicyclist(terminal velocity) can be determined when the total force acting on the “body” inthe direction of movement is equal to zero, determine the percentage of downspeed that she can be increased when she is in a racing position. Air temperatureis 150C and disregarding the rolling resistance and friction at the bearing.Three blocks m1=8.00 kg, m2=6.00 kg and m3 areconnected by massless strings that pass over frictionlesspulleys placed at the edges of the table. Block m1 rest onthe horizontal tabletop which has a coefficient of staticand kinetic friction of 0.155 and 0.133, respectively.Blocks m2 and m3 are suspended on both ends of twostrings that are connected to block A. What should bethe mass m3 such that when the system is released fromrest, block m2 ascends at a constant rate of 1.20 m/s2?What is the magnitude of the average force, in newtons, exerted on a 0.0295-kg bullet to accelerate it to a speed of 590 m/s in a time of 1.85 ms?