# Search results

1. ### Finding tension - really basic

Finding tension -- really basic Homework Statement An automobile engine has a weight whose magnitude is 3150 N. The engine is positioned above an engine, and is positioned by a rope. There is an illustration given, but it's essentially just saying that the angle concerning T1 is 10 degrees...
2. ### Acceleration on an inclined plane

Homework Statement A student is skateboarding down a ramp that is 6.2 m long and inclined at 13° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.1 m/s. Neglect friction and find the speed at the bottom of the ramp. Homework Equations F =...
3. ### Force related to mass, acceleration and time

Homework Statement At a time when mining asteroids has become feasible, astronauts have connected a line between their 3700-kg space tug and a 6100-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 460 m...
4. ### Relating force, displacement, time and velocity

Homework Statement A duck has a mass of 2.7 kg. As the duck paddles, a force of 0.13 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 54° south of east. When these forces begin to act, the velocity of the duck is 0.13 m/s in...
5. ### How long does it take for the angle of the javelin to change from 35 to 20?

Homework Statement In the javelin throw at a track-and-field event, the javelin is launched at a speed of 26 m/s at an angle of 35° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is required...
6. ### Final velocity given acceleration and initial velocity

Homework Statement A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.1 s later it is rising at a speed of 19 m/s. Assuming air resistance has no effect on the rock, calculate its speed at (a) at launch and (b) 5.2 s after the launch. Homework Equations v = v0 +...
7. ### Typical when do they collide problem

Typical "when do they collide" problem Homework Statement In a historical movie, two knights on horseback start from rest 92 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.18 m/s2, while Sir Alfred's has a magnitude of 0.34 m/s2...
8. ### How do I make the resultant vector equal zero?

Homework Statement Three forces are applied to an object, as indicated in the drawing. Force 1 has a magnitude of 33.0 newtons (33.0 N) and is directed 30.0° to the left of the +y axis. Force 2 has a magnitude of 26.0 N and points along the +x axis. What must be the magnitude and direction...