Multiple Choice
How fast would you have to throw a 150-g rock for it to have the same momentum as a 10-g sniper rifle bullet traveling at 900 m/s?
11. Momentum & Impulse
Intro to Momentum
Back11. Momentum & Impulse
Intro to Momentum
- Multiple ChoiceA250 grubber ball bounces off a wall. As it strikes the wall, it is moving in the negative x-direction at,and as it bounces off, it is moving in the positive x-direction at. What is the impulse on the ball from the wall?
- Multiple ChoiceWhat is the momentum of a600 kgcar traveling at (about35 mph)?
- Multiple ChoiceThree cars approach an intersection: an 800 kg car moves in the positive x-direction at , a 1200 kg car moves in the negative x-direction at , and a 900 kg car moves in the positive y-direction at . What is the total momentum of this system of three cars? Give your answer as a magnitude and an angle counterclockwise from the positive x-axis.
- Open QuestionTwo vehicles are approaching an intersection. One is a 2500-kg pickup traveling at 14.0 m/s from east to west (the -x-direction), and the other is a 1500-kg sedan going from south to north (the +y-direction) at 23.0 m/s. (b) What are the magnitude and direction of the net momentum?
- Open QuestionTwo vehicles are approaching an intersection. One is a 2500-kg pickup traveling at 14.0 m/s from east to west (the -x-direction), and the other is a 1500-kg sedan going from south to north (the +y-direction) at 23.0 m/s. (a) Find the x- and y-components of the net momentum of this system.
- Open Question
(I) What is the magnitude of the momentum of a 32-g sparrow flying with a speed of 8.4 m/s?
- Open Question
(III) A sled filled with sand slides without friction down a 32° slope. Sand leaks out a hole in the sled at a rate of 2.0 kg/s. If the sled starts from rest with an initial total mass of 45.0 kg, how long does it take the sled to travel 120 m along the slope?
- Open Question
(II) The force on a particle of mass m is given by F (→ above F) = 26 i (→ above i) ― 12t j (→ above j) where F is in N and t in s. What will be the change in the particle’s momentum between t = 1.0 s and t = 2.0 s?
- Open QuestionWhat are the velocities of (b) a 75 kg skydiver falling with p = -4100j kg m/s
- Open QuestionAt what speed do a bicycle and its rider, with a combined mass of 100 kg, have the same momentum as a 1500 kg car traveling at 5.0 m/s?
- Open QuestionFIGURE EX11.6 is an incomplete momentum bar chart for a collision that lasts 10 ms. What are the magnitude and direction of the average collision force exerted on the object?
- Open QuestionA tennis player swings her 1000g racket with a speed of 10 m/s .She hits a 60g tennis ball that was approaching her at a speed of 20 m/s . The ball rebounds at 40 m/s.b. If the tennis ball and racket are in contact for 10 ms, what is the average force that the racket exerts on the ball? How does this compare to the gravitational force on the ball?
- Open QuestionCALC A particle of mass m is at rest at t=0 . Its momentum for t>0 is given by px = 6t² kg m/s ,where t is in s. Find an expression for Fx(t) , the force exerted on the particle as a function of time.
- Open QuestionCALC A 500 g particle has velocity vx = −5.0 m/s at t=−2 s .Force Fx= (4−t²) N , where t is in s, is exerted on the particle between t=−2 s and t=2 s . This force increases from 0 N at t=−2 s to 4 N at t=0 s and then back to 0 N at t=2 s . What is the particle's velocity at t=2 s?