Ferns spread spores instead of seeds. One species accelerates 1.4 x 10-6 gram spores to a 4.0m/s ejection speed over a duration of 0.75 x 10-3 sec. What impulse is provided to the spores? What average total force do they sustain?

Consider the two pucks shown in the figure. As they move towards each other, the momentum of each puck is equal in magnitude and opposite in direction. Given that v; oreen = 12.0 m/s, and mblue is 25.0% greater than mareen, what are the final speeds of each puck (in m/s), if - the kinetic energy of the system is converted to internal energy? 30.0 30.0 Vgreen m/s V blue m/s

Cuttlefish use jet propulsion to move rapidly. To do this, a cuttlefish fills its muscular mantle cavity with water and then quickly expels the water through a tube-like opening. The mass of a cuttlefish is about the same as the mass of water of the same volume. A 14-cm-long and 6.0-cm-wide cuttlefish, initially at rest, is moving at a speed of 4.0 m/sm/s after expelling the water from its body. Assume that the cuttlefish has a cylindrical form, the mantle cavity has a form of a cylinder with a length of 9.0 cm, and the thickness of the muscle surrounding the sides of the cavity is 1.0 cm. Estimate the speed of the expelled water relative to the sea bed. Express your answer with the appropriate units.

A 1500 kg car is rolling horizontally at 2 m/s. You would like to stop the car by shooting a 10 kg blob of sticky clay at it, also horizontally. About how fast should you shoot the clay? O 25 m/s O2 m/s O 150 m/s 300 m/s O 0.01 m/s

The magnitude of the net force exerted in the x direction on a 2.50−kg particle varies in time as show in Figure P9.19. Find the impulse of the force over the 5.00−s time interval,

Question 3 2 points An 8.0 kg cart moving right at a speed of 6.0 m/s on a horizontal frictionless surface hits another cart with mass 50 kg moving in opposite direction with speed 20 m/s Assume that the collision is perfectly elastic, what are the velocities of the two carts after collision? O a. vaky = -2.92 m/s' veleg= 6.9 m/s O b. Pukr = -0.15 m/s' vs leg = 7.8 m/s O va ke = 4.46 m/s' Vs lkg = 5.04 m/s O vale = 0.15 m/s' Ve kg = 4.15 m/s

BIO MOTION LOAD AND THE ARCHER FISH. Archers are tropical fish that hunt by shooting drops of water from their tops onto insects to return them to the water, where the fish can eat them. A 65 g fish at rest just above the surface of the water can eject a 0.30 g drop of water in a short burst of 5.0 ms. High-velocity measurements show that the water has a speed of 2.5 m/s just after the archer expels it. What is the momentum of a drop of water immediately after it leaves the fish's mouth? What is the average force that the fish exerts on the drop of water? The fish shoots the water droplet at an insect that is moving on the surface of the water, so just before it hits the insect, the droplet is still moving with the speed it left the fish's mouth. on impact the drop sticks to the insect and the speed of the insect and the water just after the impact was measured to be 2 m/s. What is the mass of the insect?

two blocks (m1 and m2) are each released from rest at a height of h = 3.98 m on a frictionless track and when they meet on the horizontal section of the track they undergo an elastic collision. If m1 = 2.50 kg and m2 = 4.25 kg, determine the maximum heights (in m) to which they rise after the collision. Use the coordinate system shown in the figure.

An Amazon package of mass 2 kg is released from rest at an Amazon warehouse loading dock and slides down a 3.0-m-high, frictionless chute to a waiting truck. Amazon warehouse workers have no breaks, but the truck driver really needed to use the restroom, so he sneaked out without having removed the previous package, of mass m, from the bottom of the chute. Suppose the packages stick together. If their common speed after the collision is 3 meters per second, what is the mass of the package at the bottom of the chute?

A 8.0kg puck floating on an air table is traveling east at 10cm/s. Coming the other way at 30cm/s is a 2.0kg puck on which is affixed a wad of bubble gum.The two slam head-on into each other and stick together. a) Find their velocity after the impact.b) How much kinetic energy is lost?