Physics Force & Laws Of Motion Level: High School
Centre of Mass
A sulfur dioxide molecule consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom , Using the information and the data provided in the drawing at “click here” , find the coordinates of the center of mass of the sulfur dioxide molecule . Express your answer in nanometers . (1 nm = 10-9 m) .
Physics Force & Laws Of Motion Level: High School
With the engine off , a spaceship is coasting at a velocity of +290 m/s through outer space . The ship carries rockets that are mounted in firing tubes, the back ends of which are closed . It fires a rocket straight ahead at an enemy vessel . The mass of the rocket is 1400 kg , and the mass of the spaceship (not including the rocket) is 5.0 106 kg . The firing of the rocket brings the spaceship to a halt . What is the velocity of the rocket ?
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 0.180 kg projectile is fired with a velocity of +725 m/s at a 2.00 kg wooden block that rests on a frictionless table . The velocity of the block , immediately after the projectile passes through it , is +50.0 m/s . Find the velocity with which the projectile exits from the block .
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
The drawing shows a collision between two pucks on an air-hockey table . Puck A has a mass of 0.038 kg and is moving along the x axis with a velocity of +5.5 m/s . It makes a collision with puck B, which has a mass of 0.058 kg and is initially at rest . The collision is not head-on . After the collision , the two pucks fly apart with the angles .
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 2.50 g bullet , traveling at a speed of 465 m/s , strikes the wooden block of a ballistic pendulum , The block has a mass of 275 g .a). Find the speed of the bullet/block combination immediately after the collision ?
b). How high does the combination rise above its initial position ?
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
A 1055 kg van , stopped at a traffic light , is hit directly in the rear by a 790 kg car traveling with a velocity of +2.50 m/s . Assume that the transmission of the van is in neutral . the brakes are not being applied , and the collision is elastic . what is the final velocity of each vehicle ?
Physics Force & Laws Of Motion Level: High School
A 55 kg swimmer is standing on a stationary 250 kg floating raft . The swimmer then runs off the raft horizontally with a velocity of +5.3 m/s relative to the shore . Find the recoil velocity that the raft would have if there were no friction and resistance due to the water .
Physics Force & Laws Of Motion Level: High School
A baseball (m = 149 g) approaches a bat horizontally at a speed of 42.9 m/s ( 96 mi/h) and is hits straight back at a speed of 46.0 m/s (103 m/h ) . If the ball is in contact with the bat for a time of 1.10 ms , What is the average force exerted on the ball by the bat ? Neglect the weight of the ball . since it is so much less than force of the bat . Choose the direction of the incoming ball as the positive direction .
Physics Force & Laws Of Motion Level: High School
While ice-skating you push off a wall with a force of 100 N . Calculate your acceleration if you have a mass of 50 kg and the coefficient of sliding friction between your skates at the ices is 0.09 .
Physics Kinematics Level: High School
Circular motion
A marble is set spinning around the inside of a frictionless cone whose sides slope at an angle of 45 degree . The marble rotates steady in a horizontal circle of radius 80 mm . What is the frequency of rotation ?
Physics Work,Power & Energy Level: High School
Vertical Circle Or loop the loop
A road over a bridge has the form of a vertical circular arc of radius 20 m . What is the fastest speed at which a car can cross the bridge without leaving the ground at the crest of the road ?
Physics Force & Laws Of Motion Level: High School
A particle of mass 3 kg rests on smooth horizontal table and attached to string 1.2 m long to fixed point in table . if particle moves in a horizontal circle with constant speed of 2.4 ms^-1 find the tension in the string ?
Physics Work,Power & Energy Level: High School
A man mass 80 kg rides a bicycle mass 20 kg at steady speed 4.0 ms^-1 up a road which rides 1 m every 20 m along its length . What power is the cyclist delivering if there is constant resistance to motion of 20 N ?
Physics Rotational Mechanics Level: High School
A steel band exerts a horizontal force of 80.0 N on a tooth at point B as shown in the figure at “click here” . What is the torque on the root of the tooth about point A ?
Physics Rotational Mechanics Level: High School
Centre of mass
If m = 0.50 kg , L = 1.2 m and the mass of each connecting rod shown in the figure at “click here” is negligible , what is the moment of inertia about an axis perpendicular to the paper through the center of mass ? Treat the masses as particles .