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A wheel rotating about a fixed axis has an angular position given by θ = 3 - 2t3 where θ is measured in radia?
A wheel rotating about a fixed axis has an angular position given by θ = 3 - 2t3 where θ is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2 s?
-1 rad/s2
-15 rad/s2
-24 rad/s2
-10 rad/s2
2 AnswersPhysics9 years agoA 3 kg and a 2 kg cart approach each other on a horizontal air track. They collide and stick together. After t?
A 3 kg and a 2 kg cart approach each other on a horizontal air track. They collide and stick together. After the collision their total kinetic energy is 40 J. The speed of the object of two stacked carts is:
4 m/s
6.3 m/s
zero
5.2 m/s
1 AnswerPhysics10 years agoBlock A, with a mass of 2 kg, moves along the x axis with a velocity of 5 m=s in the positive x direction. It?
Block A, with a mass of 2 kg,
moves along the x axis with a velocity of 5 m=s in the positive x direction. It su®ers an elastic collision with block B, initially at rest, and the two blocks leave the collision along the x axis. If the mass of B is much more than the cmass of A, the speed of A after the collision is:
Answer:
- 5 m/s
+10 m/s
0
-10 m/s
2 AnswersPhysics10 years agoA 0.12-kg ball is moving east at velocity v when it is hit by a bat, causing it to reverse direction and have?
A 0.12-kg ball is moving east at velocity v when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s west. If the momentum of the ball change by 2.4 kg.m/s west, what is the initial velocity of the ball?
Answer 18 m/s
-18 m/s
6 m/s
24 m/s
1 AnswerPhysics10 years agoTwo identical billiard balls have velocities of 2 m/s and −1 m/s when they meet in an elastic head‑on collisio?
Two identical billiard balls have velocities of 2 m/s and −1 m/s when they meet in an elastic head‑on collision. What is the final velocity of the first ball after collision?
Answer - 0.5 m/s
- 1 m/s
+ 1 m/s
- 2 m/s
2 AnswersPhysics10 years agoA horizontal force of 100 N is applied to move a 45 kg box across a 9 m level (horizontal)surface. What work i?
A horizontal force of 100 N is applied to move a 45 kg box across a 9 m level (horizontal)surface. What work is done by the 100 N force?
Answer 40500 J
100 J
400 J
900 J
2 AnswersPhysics10 years agoIf the vectors A and B have magnitudes of 10 and 11, respectively, and the scalar product of these two vectors?
If the vectors A and B have magnitudes of 10 and 11, respectively, and the scalar product of these two vectors is –100, what is the angle between the two vectors when they are drawn starting from the same point?
Answer 155°
90°
120°
60°
2 AnswersPhysics10 years agoA ball of mass m has a speed v has a kinetic energy K1. What is its kinetic energy K2 if its speed were doubl?
A ball of mass m has a speed v has a kinetic energy K1. What is its kinetic energy K2 if its speed were doubled?
2 AnswersPhysics10 years agoA 40 kg box initially at rest is pushed 5 m along a rough, horizontal floor with a constant applied horizontal?
A 40 kg box initially at rest is pushed 5 m along a rough, horizontal floor with a constant applied horizontal force, the work done by the applied force is 650 J. If the final speed of the box is 1 m/s, find the work done by friction.
2 AnswersPhysics10 years agoA 40 kg box initially at rest is pushed 5 m along a rough, horizontal floor with a constant applied horizontal?
A 40 kg box initially at rest is pushed 5 m along a rough, horizontal floor with a constant applied horizontal force, the work done by the applied force is 650 J. If the final speed of the box is 1 m/s, find the work done by friction.
2 AnswersPhysics10 years agoWhat is the work done by the spring in stretching it a distance of 0.5 m if the force constant of the spring i?
What is the work done by the spring in stretching it a distance of 0.5 m if the force constant of the spring is 48 N/m?
1 AnswerPhysics10 years agoA 5 kg ball on the end of a rope is whirled at a constant speed of 1 m/s in a horizontal circle of radius 3 m.?
A 5 kg ball on the end of a rope is whirled at a constant speed of 1 m/s in a horizontal circle of radius 3 m. What is the work done by the centripetal force during one complete cycle?
1 AnswerPhysics10 years agoWhat is the value of the spring constant of a spring that is stretched a distance of 0.1 m if the restoring fo?
What is the value of the spring constant of a spring that is stretched a distance of 0.1 m if the restoring force (force of the spring) is 24 N?
2 AnswersPhysics10 years agoHow much work is done by a person lifting a 2 kg object from the bottom of a well at a constant speed? The wel?
How much work is done by a person lifting a 2 kg object from the bottom of a well at a constant speed? The well is 10 m deep.
3 AnswersPhysics10 years agoA 0.6 kg particle has a kinjetic energy of 10 J at point A and kinetic energy of 7.5 J at point B.?
A 0.6 kg particle has a kinjetic energy of 10 J at point A and kinetic energy of 7.5 J at point B. What is the total work done on the particle as it moves from A to B?
plz help me in answer this question
1 AnswerPhysics10 years agoComplete the following statement: The direction of the instantaneous velocity of a particle is ......?
Complete the following statement: The direction of the instantaneous velocity of a particle is ......
tangent to the path of the particle.
the same as the direction of the acceleration of the particle.
perpendicular to the path of the particle.
the same as the direction of the average velocity vector.
1 AnswerPhysics10 years agoA steel ball is tied to the end of a string and swung in a vertical circle at constant speed. Complete the fo?
A steel ball is tied to the end of a string and swung in a vertical circle at constant speed. Complete the following statement: The direction of the acceleration of the ball is always
tangent to the circle.
toward the center of the circle.
vertically downward.
radially outward from the circle.
3 AnswersPhysics10 years agoAt t = 0, a particle leaves the origin with a velocity of 8 m/s in the positive x direction and moves in the x?
At t = 0, a particle leaves the origin with a velocity of 8 m/s in the positive x direction and moves in the xy plane with a constant acceleration of (-2 i - 4 j) m/s2. What is the maximum horizontal displacement that the particle reaches during its motion?
1 m
2 m
4 m
16 m
2 AnswersPhysics10 years agoparticle in Uniform circular motion question ,,, plz help?
A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center as shown in the figure. The linear speed of a passenger on the rim is constant and equal to 7.0 m/s. What are the magnitude and direction of the passenger's acceleration as she passes through (a) the lowest point in her circular motion? (b) The highest point in her circular motion? (c) How much time does it take the Ferris wheel to make one revolution?.
3 AnswersPhysics10 years agoAn ant is on a picnic table. it travels 30 cm eastward, then 25 cm northward and finally 15 cm westward. What?
Question 7 .
An ant is on a picnic table. it travels 30 cm eastward, then 25 cm northward and finally 15 cm westward. What is the ant's direction of displacement with respect to its original position?
Answer 29° N of E
77° N of E
59° N of E
29° N of W
2 AnswersPhysics10 years ago