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1. An astronaut traveling forward at 0.87c holds a meterstick in spear -like fashion. The astronaut sees the spe?

1 meter. .

2 Answers · Science & Mathematics · 18/12/2010

2. A 83-kg fisherman in a 136-kg boat throws a package of mass m = 15 kg horizontally toward the right with a spe?

AN 83.....? (83 + 136) = 219kg. (15 x 4.4)/219 = 0.3m/sec., left.

2 Answers · Science & Mathematics · 05/10/2012

3. A 10-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a spe?

(a) translational kinetic energy = (1/2)*m*(v^2) =(1/2)*10*(10^2) =500J (b) rotational kinetic energy =(1/2)*I*(w^2) w-angular velocity(omega), I-moment of inertia =(1/2)*(2/5*m*r^2)(w^2...

2 Answers · Science & Mathematics · 24/12/2012

4. Tarzan swings on a 30.0 m long vine initially inclined at an angle of 32.0° with the vertical. What is his spe

960mph. lol jk

2 Answers · Science & Mathematics · 10/08/2008

5. A motorist travels from A to B at a speed of 40 km/hr and returns back at a speed of 60 km/hr. His average spe?

50km/hr (40+60) divide by 2 = average speed

2 Answers · Science & Mathematics · 31/10/2012

6. A friend of yours is loudly singing a single note at 400 while racing toward you at 24.5 on a day when the spe?

Don't forget to supply what units you are working with! (342 + 24.5) = apparent V of 366.5m/sec. a) (366.5/342) x 400 = 428.655Hz. b) 428.655Hz.

2 Answers · Science & Mathematics · 30/01/2013

7. The earth has a radius of 6.38 x 106 m and turns on its axis once every 23.9 h. (a) What is the tangential spe?

OK, simple V=D/T. Velocity = Distance/Time D = 2 x pi x r . T (in seconds) is 23.9 x 3600 (seconds in an hour) Since everything is nice an linear - the R for part be needs to be 1/3 of...

1 Answers · Science & Mathematics · 04/07/2013

8. (a) What is the momentum of a garbage truck that is 1.20×104 kg and is moving at 10.0 m/s ? (b) At what spe?

(a) p = mv = 1.2e5 kg·m/s (b) v = p / m = 1.2e5kg·m/s / 8kg = 1.5e4 m/s = 15 km/s

1 Answers · Science & Mathematics · 24/06/2016

9. A 6.0-kg block is pushed 8.0 m up a rough 37º inclined plane by a horizontal force of 75 N. If the initial spe?

a) 0.5*m*v^2 = 12 J b) F*d = 600 J c) F*d = -200J d) F*d = m*g*(8sin(37)) = -283.38 J e) F*d = 0 J f) W_net = 600 - 200 - 283.38 = 116.62 J

1 Answers · Science & Mathematics · 29/11/2009

10. A 68-kg fisherman in a 120-kg boat throws a package of mass m = 15 kg horizontally toward the right with a spe?

Momentum is conserved; the initial momentum of the system is zero, as is the final momentum: m*V = M*v → v = V*m/M = 4.1*15/188 v = 0.327 m/s

1 Answers · Science & Mathematics · 03/12/2012