(II) What average force is needed to accelerate a 9.20-gram pellet from rest to 125 m/s over a distance of 0.800 m along the barrel of a rifle?
Q: (II) A falling rock has kinetic energy KE just before strikingthe ground and coming to rest. What is…
A: Given, Kinetic energy is KE. Assume T0 is the temperature of both the rock and the environment and Q…
Q: ) Ifa body losses half of its velocity on penetrating 3cm in a wooden block then how much will it…
A:
Q: (III) Determine the CM of the uniform thin L-shaped con- struction brace shown in Fig. 7–40. y -…
A: Given, Length of a rod lying in horizontal direction, L x = 2.06 m Length…
Q: (II) A 28-g rifle bullet traveling 190 m/s embeds itself in a3.1-kg pendulum hanging on a 2.8-m-long…
A:
Q: A novice pool player is faced with the corner pocket shot shown in Fig. 7–49. Relative dimensions…
A: Consider an elastic collision between two objects of equal mass, with target object initially at…
Q: . (I) Determine the CM of an outstretched arm using Table 7–1.
A:
Q: (I) The distance between a carbon atom(m=12u) and an oxygen atom(m=16u) in the CO molecule is…
A:
Q: (II) A 0.280-kg croquet ball makes an elastic head-on collision with a second ball initially at…
A: a) The velocity will be given,
Q: 47. A dropped rubber ball hits the floor with a speed of 8.0 m/s and rebounds to a height of 0.25 m.…
A: 47) Initial velocity (u) = 8 msLet the mass = m final height after rebound (h) = 0.25 m
Q: what is the speed of the ball at the lowest point? (b) Does the speed increase, decrease, or remain…
A: Given : Angle rotated, θ = 30° Length of the rod, L = 2.0 m Mass of ball, m…
Q: 12–95. The basketball passed through the hoop even though it barely cleared the hands of the player…
A:
Q: (II) A 52-kg woman and a 72-kg man stand 10.0 m apart onnearly frictionless ice. (a) How far from…
A:
Q: (II) A 125-kg astronaut (including space suit) acquires a speed of 2.5 m/s by pushing off with her…
A: Given The mass of astronaut is ma = 125 kg. The final velocity of the astronaut is vaf = 2.5 m/s.…
Q: (II) An atomic nucleus at rest decays radioactively into analpha particle and a different nucleus.…
A: From conservation of energy,
Q: (II) During a Chicago storm, winds can whip horizontally at speeds of 100 km/h. If the air strikes a…
A:
Q: If you place two apples on a table 5 cm apart, they will stay there until you move them. Why don't…
A: When two magnets are placed on table 5 cm apart then due to magnetism property both magnet attract…
Q: (II) A baseball (m=145g) traveling 32m/s moves a fielder’s glove backward 25 cm when the ball is…
A:
Q: (III) Air in a 120-km/h wind strikes head-on the face of abuilding 45 m wide by 75 m high and is…
A: Given:Air wind strikes = 120-km/hWide = 45 mHigh = 75 mMass = 1.3 kg
Q: (II) A ball of mass 0.440 kg moving east (+x direction) with a speed of 3.80 m/s collides head-on…
A:
Q: he catapult hurls a stone of mass 32.0 g with a velocity of 50.0 m/s at a 30.0 angle of elevation.…
A: Given: Mass of the stone, m = 32.0 g = 0.032 kg. Velocity of the stone, u = 50 m/s. Angle of…
Q: (III) A pendulum consists of a mass M hanging at the bottom end of a massless rod of length l, which…
A: Given information: The pendulum consists of a mass M The length of the pendulum, l Another mass m…
Q: (II) Three cubes, of side lo, 2l,, and 3l,, are placed next to one another (in contact) with their…
A: Three cubes with the sides l0, 2lo and 3l0 are placed next to one another in contact with their…
Q: 10. Which of the following would have the most momentum? O A baseball traveling at 60 miles per…
A:
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- (III) (a) Calculate the impulse experienced when a 55-kg person lands on firm ground after jumping from a height of 2.8 m. (b) Estimate the average force exerted on the person's feet by the ground if the landing is stiff-legged, and again (c) with bent legs. With stiff legs, assume the body moves 1.0 cm during impact, and when the legs are bent, about 50 cm. [Hint: The average net force on him, which is related to impulse, is the vector sum of gravity and the force exerted by the ground. See Fig. 7-34.] We will see in Chapter 9 that the force in (b) exceeds the ultimate strength of bone (Table 9–2). mg F. grd FIGURE 7-34 Problem 24.(III) A 0.145-kg baseball pitched horizontally at 27.0 m/s strikes a bat and pops straight up to a height of 31.5 m. If the contact time between bat and ball is 2.5 ms, calculate the average force between the ball and bat during contact.An apple bruises if a force greater than 8.0 N is exterted on it. Would a 0.10 kg apple bruise if it falls 2 meters and stops after sinking 0.060 meters into the grass?
- (I) A constant friction force of 25 N acts on a 65-kg skierfor 15 s on level snow. What is the skier’s change in velocity?(II) A 144-g baseball moving 28.0 m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. After hitting the brick, the baseball bounces straight back, and the brick moves forward at 1.10 m/s .(a) What is the baseball’s speed after the collision?(b) Find the total kinetic energy before and after the collision.(II) A 22-g bullet traveling 240 m/s penetrates a 2.0-kg block of wood and emerges going 150 m/s If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
- #4(II) A 7700-kg boxcar traveling 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s What is the mass of the second car?(II) A 980-kg sports car collides into the rear end of a 2300-kgSUV stopped at a red light. The bumpers lock, the brakesare locked, and the two cars skid forward 2.6 m before stopping. The police officer, estimating the coefficient of kineticfriction between tires and road to be 0.80, calculates thespeed of the sports car at impact. What was that speed?
- A 49g golf ball is hit from rest using a golf club at an angle of e= 35 degrees and reaches a horizontal distance of 171m. Assume negligible air resistance therefore only gravitational acceleration. i) Determine the how long the club is contact with the ball if the force exerted on the ball is 0.3kN. Hint: use projectile motion in both directions. [6] II) The golf ball hits another stationary golf ball of the same mass, determine the final velocities of the two balls if, the moving ball transfers 56% of its momentum to the stationary ball.[4] Ax Click "Browse" to locate your file and then click "Upload" to upload your file. (Maximum file size: 40MB) Cil. (I) A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 15.0 m/s. A 3350-kg load, initially at rest, is dropped onto the car. What will be the car’s new speed?