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A projectile is fired at an angle αwith initial velocity v0. If it experiences the
resistive force 𝐹𝑟 = −𝑘𝑣
2
, find the expression for distance covered x as a
function of vx ant time. Also discuss the special cases.
An 1100-kg car traveling at 27.0 m/s starts to slow down and comes to a complete stop in 578 m. What is the magnitude of the average braking force acting on the car?
A 320 N crate is pulled across a rough floor with a force of P=150 N as shown. The coefficient of kinetic friction between the crate and the ground is 0.30.
(a) Draw a free body diagram of the crate on a separate page.
(b) What are the normal and frictional forces acting on the crate?
(c) What is the acceleration of the crate?
A car is moving at 65.0 km/h at a distance of 125 m from a traffic light when the light turns red. The weight of the car is 14800 N
(a) What is the mass of the car in kg?
(b) If the driver wishes to stop at the light, what is the required constant acceleration of the car in m/s^2
(c) What will be the velocity of the stone when it hits the water?
Calculate the position of the cg of a shaft
If a fourth particle of mass 2.00kg is placed at x=0, y=0.250m in ex 1 find the x and y coordinates of the central gravity
A stone is thrown upward with a velocity of 4.0 m/s dropped from a bridge that is 15 metres above the water.
(a) How high above the bridge does the stone rise?(a) How high above the bridge does the stone rise?
(b) How long will it take for the stone to reach the water?
(c) What will be the velocity of the stone when it hits the water?
A particle of mass m moves with momentum of magnitude p
A). Show that the kinetic energy of the particle is K = p^2 / 2m.
B). An object has a kinetic energy of 275J and a momentum of magnitude 25.0 kgm/s. Find the speed and mass of the object.
A bomb, initially at rest, explodes into several pieces
A. Is linear momentum of the system conserved? Explain
B. Is kinetic energy of the system conserved? Explain
