University:
University of Colorado Boulder
Course:
PHYS 2010 | General Physics 1
Academic year:

2019
Views:

305

Pages:

2
Author:

Friniarot77x8

Name HPS Motion & Forces Calcs 2020 % .20 AO Per OBJECTIVE: Describe motion & forces both qualitatively and quantitatively (Obj 1, 3-5) Velocity = Displacement/time (x/t) direction Force - mass x acceleration (direction) Momentum (p) = mass x velocity (direction) Speed = Distance/time (d/t) Acceleration = (vr - Vi)/time Weight = mass x gravity What is the difference between distance and displacement? Draw a picture if tAoved objJV //T) fvv i-fa StaH-i ' 2. If I go 3 miles east, 5 miles south, and 3 miles west, what are my displacement and distance? - 5 rvVi iTcutk d - 11 rv* i 7 3^ 5 J » ' ^ 3. Converf 4 days to seconds. (4 days is a measurement) 4 d 3.4 > \ idr | 3 bD 0~ r ) r y 34£, (DDD ^ 4300 000 s 4. If a train goes 52 mi/hr for 2.0 days, how far will it go? (5 8 r( p 7 • \i v / 3500 3 55 Mi hr > < 4 / - i ^ 4& K = sy ^ > ^ ^^ — — 5. If a sprinter goes from 0 m/s to 8 m/s in 0.1 seconds, what is her acceleration? & Orvv /5 - t ,I s I 80 *(s * l Vkc ptfS jw. - 6. If you shout into the Grand Canyon, your voice travels at the speed of sound (340 m/s) to the bottom of the canyon and back , and you hear an echo. How deep is the Grand Canyon at a spot where you can hear your echo 5.2 seconds after you shout? S- t- 340 ^ / s 3 0 ^ SfcO hA d. - r 7. Falling objects drop with an average acceleration of 9.8 m/s2. If an object falls from a tall building, how long will it take before it reaches a speed of 49 m/s? ±-? 01 - = I H' Q M/ S t VL - 0 V/4 ^ 4 An|S ^ I i * 6.0 S 8. What is the weight (in pounds) of a 7.0 kg bowling ball on Earth’s surface. (1kg = 2.2 lbs) What is the weight in N? 5 51 ^ ^^ 1 ^ ^ I b| p 9. What is the mass of a 7.0 kg bowling ball on the surface of the moon? M A S S VWdr cVya \r\ cy5 i c\ r\ iji«Mere [ 1.0 10. What is the weight (in Newtons ) of a 7.0 kg bowling ball on the surface of the moon? Gravity on the moon is 1.6 m/s2. W- rv\ ~ y j * I I NJ] 11. What is the rate of acceleration of a 2,000-kilogram truck if a force of 4,200 N is used to make it start moving forward? MV 4 £00 M -- 3 12. How much force is needed to acceierafelT68'kg skier at a rate of 1.2 m/ s2? F=? m . ^ ^ f F - 6TM ] ( - ~ A - L A. ( ) VY> S 3 13. What is the mass of an object that needs a force of 4,500 N to accelerate it at a rate of 5 m/s2? - AtSDp 4 , 5 £O k J rv\ =• ? F KJ ( r n )( 5 6 6 rvi - P p | 5 r^ f s x * 14. My friend’s mass is 65 kg. What is her weight in N? 6 \ A/ \ — KV 1 w^ 3 w - KI) bin 15. Calculate the momentum of a 11.35 kg wagon rolling down a hill at 12 m/s. p - mar rr\' I ( . 3*5 ^ p c QI . 3S k *))( Q- Ws) pc lg . 91 j \ AO ^ pj PfOK hi i{ Ar ~ ( 3-. rv> / S> 16. Which has more momentum: a 6,000 kg elephant napping or a 0.15 kg baseball traveling at 40 m/s? L £ PHA )0T PM/ S) p < (POOD p- D l 17. Which has more momentum . vS p Cp ^ M nXjX : a 111 kg linebacker running at a peed of 5.6 m/s or a 82 kg quarterback moving at 2.5 m/s. p /) M S C p '- 2 0 5 -^ QP>