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Compare simple harmonic motion with a motion which is harmonic but not simple harmonic motion.
A motorist is speeding along at 120 km/hr when he sees a squirrel on the road 200 meters in front of him. He tries to stop, but it takes 12 seconds for his car to stop. Assume acceleration was constant. (i) What is the acceleration of the car?
A 15 g bullet traveling parallel to an inclined ramp strikes a 2.74 kg block of wood and becomes imbedded in it. The impact drives the block a distance of 26 cm up the ramp. The ramp is inclined at 28°, and the coefficient of friction is 0.40. What is the speed of the bullet just before impact?
Mike is on a hunting trip but dosent like to shoot at animals so he places a baseball in a tree right above him. Than shoots a bullet (0.02 kg) at the baseball (0.15 kg). The two objects embed and Rose to a max height of 13.5 meters before coming back down. What was the initial velocity of the bullet?
A child who weighs 325 N stands 5 m from the right end of a 12 m plank. A 150 N load has its center of gravity 4 m from the same end. The plank weighs 110 N. If the plank is supported at its ends, find the force exerted by each support. Show solutions.
A child who weighs 325 N stands 5 m from the right end of a 12 m plank. A 150 N load has its center of gravity 4 m from the same end. The plank weighs 110 N. If the plank is supported at its ends, find the force exerted by each support. Show solutions.
The diagram shows five different moving objects. Which of the objects are moving at a constant speed? (T5:23)
a) Left Arrow 6N, Right Arrow 10N
b) x2 Right Arrows 4N
c) Left Arrow 5N, Right Arrow 2N, Right Arrow 3N
d) Left Arrow 6N, x2 Right Arrow 6N
e) Left Arrow 3N, Left Arrow 8N, Right Arrow 4N, Right Arrow 6N
7.Police suspect that a van was breaking the speed limit when it collided with a parked car. Investigations provided them with the following data: mass of parked car = 800 kg, mass of van = 1000 kg, velocity of car after collision = 5 m/s, velocity of van after collision = 11 m/s
Show whether the van was breaking the 30 mph speed limit (equivalent to 13 m/s).
8.A dodgem car of mass 200 kg moves with a velocity of 3 m/s. The moving dodgem collides with a stationary one of mass 180 kg.
After the collision, the 200 kg dodgem continues to move in the same direction at a speed of 1 m/s.
Calculate the speed v with which the 180 kg (second) dodgem moves to the right after the collision.
A body with a mass of 100kg accelerates down an inclined plane at an angle of 60 degrees. There is a friction involved in impeding this motion.
a. draw a free body diagram identifying all forces acting on the body.
b. show that the acceleration of the body can be calculated without the mass.
c. if the coefficient of kinetic friction is 0.05, determine the acceleration of the body.
