A 1370-kg car is moving due east with an initial speed of 29.0 m/s. After 6.37 s the car has slowed down to 15.8 m/s. Find the magnitude of the net force that produces the deceleration. Number ________ Units ________

Figure shows a block of mass m resting on a 20° slope. The block has coefficients of friction μ = 0.78 and = 0.47 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. (Figure 1) Figure Part A m= Part B What is the minimum mass m that will stick and not slip? Express your answer to three significant figures and include the appropriate units μA Value a= m 20⁰ Value Units www Units ? If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will Express your answer to three significant figures and include the appropriate units. 2 kg 1 of 1 ?

A car with a mass of 1.2x103 kg is skidding to a stop along a horizontal surface. The car decelerates from 32.2 m/s to rest in 3.89 seconds. Assuming negligible air resistance, determine the coefficient of friction between the car tires and the road surface. Answer: μ =_________ (no units) (rounded to nearest hundredths place)

Question 3. The cart shown in figure below moves with constant deceleration changing the speed from v0 = 5 m/s to v1 = 1 m/s. After 2 seconds when it reaches the speed v1 it suddenly stops. Write the displacement of the mass as a function of time. Mass m moves without friction on the surface of the cart. Assume positive direction from left to right (direction of motion of the cart). Numerical values: m = 2 kg, k = 1.152 kN/m. V k Ans: x(t) = 3.472 cos 24 t + 41.6 sin 24 t (mm) m L

A pickup truck weighing 2500 kg travels at a constant speed of 19m/s around a circular track. The diameter of the circular track is 59m. What is the magnitude of the acceleration of the truck? Please write the answer in one decimal place

A lump of clay of mass 0.28 kg is dropped from a height of 10.8 m. The clay comes to a full stop  0.075 s after the moment it first touched the ground. What is the magnitude in newtons of the average force of impact that the clay experienced? Express your answer in two decimal places, with units of Newtons.

A truck collides with a car, and during the collision, the net force on each vehicle is essentially the force exerted by the other. Suppose the mass of the car is 850 kg, the mass of the truck is 2,750 kg, and the magnitude of the truck's acceleration is 14 m/s2. Find the magnitude of the car's acceleration (in m/s2).

The speed v of a bullet satisfies the relation vt = 84 m, where t = 0.20 s. Find v. m/s

The masses of the Atwood's machine are M = 10 kg and m = 2.3 kg, respectively. The acceleration (m/s2) of the system is: