Physics Force & Laws Of Motion Level: Misc Level
2 forces act on a car. Force A is equal to 120 N west, and force B is 200 N at 60 % N of W. What are the magnitude and direction of the resultant force on the car?
Physics Force & Laws Of Motion Level: Misc Level
Draw a free body diagram for (a) and .Isolate a point where the important forces are acting, and represent each force as a vector.Determine the reference angle and label the components.
-If rope B in fig.(a) will break for tensions greater than 200 Ib, what is the maximum weight W that can be supported?
Physics Force & Laws Of Motion Level: Misc Level
A steel block weighing 240 N rests on a level steel beam. What horizontal force will move the block at constant speed if the coefficient of kinetic friction is 0.12?
Physics Force & Laws Of Motion Level: Misc Level
A horizontal force of 40 N will just start an empty 600 N sled moving across packed snow. After motion is begun, only 10- N is needed to keep motion at constant speed. Find the coefficients of static and kinetic friction.
Physics Force & Laws Of Motion Level: Misc Level
A wire is stretched between 2 poles 10 meters apart. A sign is attached to the midpoint of the line causing causing it to sag vertically a distance of 50 cm. If the tension in each line segment is 2000 N, what is the weight of the sign?
Physics Force & Laws Of Motion Level: Misc Level
An 80 - kg man balances the boy on a teeter -totter. Fulcrum is located 4 m from the boy and 1 m from the man. What approximately, is the magnitude of the downward force exerted on the fulcrum?
Physics Force & Laws Of Motion Level: Misc Level
A child is pushing a box of mass 6 kg up a smooth inclined plane which is at an angle 17 degrees to the horizontal. The box is pushed parallel to the plane, and its acceleration is 0.7 m/s 2.Find the force between the plane and the box.
Physics Force & Laws Of Motion Level: Misc Level
A ball of mass 1.6 kilograms is projected with a velocity 19.5 m/s in a direction 30.7 degrees from the horizontal. The acceleration due to gravity is g =9.81 m/s 2. What is the force acting on the ball the moment it is projected (in Newtons)
Physics Force & Laws Of Motion Level: Misc Level
A bucket of water which weighs 10.7 Newtons is pulled vertically using two forces. The first of magnitude 8.6 Newtons acts at an angle 59 degrees from the vertical. The second acts at an angle 18 degrees from the vertical. Find the net force acting on the bucket (due to the forces and the weight) in Newtons.
Physics Force & Laws Of Motion Level: Misc Level
A box of mass 8.3 kg placed on a smooth horizontal table is acted on by two horizontal force. The first of magnitude 0.3 Newtons acts due East, and the second of magnitude 0.3 Newtons acts due North. Find the velocity of the box after 14.9 seconds.
Physics Force & Laws Of Motion Level: Misc Level
Two people on ice skates stand face -to-face on the ice and then push each other away. Their masses are 60 kg and 90 kg If immmediately afterwards the person with mass 60kg is moving at a speed of 1 m /s, how fast is the 90 kg person moving?
Physics Force & Laws Of Motion Level: Misc Level
A 40 kg boy on roller skates moves with a speed of 4 m /s.He runs into a 30 kg girl on skates who is initially not moving. Assuming they cling together, what is their speed right after the collision?
Physics Force & Laws Of Motion Level: Misc Level
A small rocket loses mass at a rate of Dm /Dt=8 kg /s through its rocket engine. If the speed of the exhaust gas coming out the back of the rocket is 600 m /s, what is the force on the rocket? Hint: Use Newton s second law in its alternative from F =D (mv /Dt.
Physics Force & Laws Of Motion Level: Misc Level
Carts A and B stick together whenever they collide. The mass of cart A is twice that of B.How could you roll the two carts together ( i. e. at what relative speeds ) so that they would be stopped after the collision? ( Assume there is no friction )
A) You would roll them at same speed towards each other.
B) You would roll them towards each other.with B having twice the speed of A.
C) You would roll them towards each other, with A having twice the speed of B.
D) You would keep A at rest and crash B into it.
Physics Force & Laws Of Motion Level: Misc Level
The magnitude of the momentum of a particle is 32 kg m /s at a certain. If the velocity has a magnitude of 20 m/s at that instant, the mass of the particle is:
