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PHYSICS Unit 3 MEC REVISION LECTURE by Gurwinder Singh, Parkwood Sec College. Motion in one and two dimensions. 18. The following diagram shows a car rolling down a slope. The car has a mass of 1.2 10 3 kg and the slope is at 15 to the horizontal. - PowerPoint PPT Presentation
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PHYSICS Unit 3 MEC REVISION LECTURE
byGurwinder Singh,
Parkwood Sec College
Motion in one and two dimensions
The following diagram shows a car rolling down a slope. The car has a mass of 1.2 103 kg and the slope is at 15 to the horizontal. The acceleration due to gravity is 10 m s2.
18
On the diagram mark in the forces acting on the car.
If the total resistance force acting on the car has a magnitude of 1000 N, calculate the acceleration of the car.
19
19
18
The component of the weight force acting parallel to the slope is sinmg = 1.2 104 N sin 15 = 3.1 103 N The net force acting on the car is 2.1 103 N down the slope.
maF
mFa
kg 101.2N 101.2
3
3
= 1.8 m s 2 down the plane.
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