Aboy is exerting a force of 70 n at a 50-degree angle on a lawn mower. he is accelerating at 1.8 m/s2. round the answers to the nearest whole number. what is the mass of the lawn mower? what is the normal force exerted on the lawn mower?

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

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