1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton

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1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton

1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton
1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?
2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton) blocks.How much work was done in raising one of the blocks to a height of 53
3.If your car accelerates from rest at a steady rate of 4 m/s2,how soon will it reach 88 km/h (54.7 mph or 24.4 m/s)?
4.On Mars,the acceleration due to gravity is 3.71 m/s2.How far would a rock fall in 5 s if you dropped it on Mars?
5.A basketball player can leap upward 0.44 m.What is his initial velocity at the start of the leap?
6.A sprinter can reach a speed of 9.4 m/s in 0.95 s.If the sprinter’s acceleration is constant during that time,what is the sprinter’s acceleration?
7.How much does a 84-kg person weigh on earth?
8.As water descends from the top of a tall hydroelectric dam,its gravitational potential energy is converted to electric energy.How much gravitational potential energy is released when 900 kg of water descends 230 m to the generators?
9.You’re using a wedge to split a log.You are hitting the wedge with a large hammer to drive it into the log.It takes a force of 3100 N to push the wedge into the wood.If the wedge moves 0.2 m into the log,how much work have you done on the wedge?
10.You’re sanding a table.You must exert a force of 32 N on the sandpaper to keep it moving steadily across the table’s surface.You slide the paper back and forth for 21 minutes,during which time you move it 1000 m.How much work have you done?

1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton
1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?
已知：V0=0,m=12320kg,a=0.57m/s²,Vt=22.8m/s.
求：s=?
由Vt²-V0²=2as有,s=(Vt²-V0²)/2a=(22.8²-0)/(2×0.57)=456m.
答：略.
2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton) blocks.How much work was done in raising one of the blocks to a height of 53
已知：m=22000kg,h=53m,g=9.8m/s²
求W=?
由公式W=mgh有,W=22000 × 0.8 × 53=11426800J
答：略.
3.If your car accelerates from rest at a steady rate of 4 m/s2,how soon will it reach 88 km/h (54.7 mph or 24.4 m/s)?
已知V0=0,a=4m/s²,Vt=22.4m/s
求：t=?
由公式Vt=V0+at有,t=(Vt-V0)/a=(22.4-0)/4=5.6s.
答：略.
4.On Mars,the acceleration due to gravity is 3.71 m/s2.How far would a rock fall in 5 s if you dropped it on Mars?
已知g'=3.71m/s²,t=5s
求：h=?
由公式h=gt²/2有,h=3.71 × 5²/2=46.25m.
答：略.
5.A basketball player can leap upward 0.44 m.What is his initial velocity at the start of the leap?
已知：h=0.44m,g=9.8m/s²
求：V0=?
由公式h=V0²/2g有,V0=√(2gh)==√(2×9.8×0.44) ≈2.94m/s
答：略.
6.A sprinter can reach a speed of 9.4 m/s in 0.95 s.If the sprinter’s acceleration is constant during that time,what is the sprinter’s acceleration?
已知：V0=0,Vt=9.4m/s,t=0.95s
求：a=?
由公式Vt=V0+at有,a=(Vt-V0)/t=(9.4-0)/0.95≈9.89m/s²
答:略.
7.How much does a 84-kg person weigh on earth?
已知：m=84kg,g=9.8m/s²
求：G=?
由公式G=mg有,G=mg=84×9.8=823.2N
答：略.
8.As water descends from the top of a tall hydroelectric dam,its gravitational potential energy is converted to electric energy.How much gravitational potential energy is released when 900 kg of water descends 230 m to the generators?
已知：m=900kg,Δh=230m,g=9.8m/s²
求E=?
由公式ΔEp=mgΔh有,ΔEp=mgΔh=900 × 9.8 × 230=2028600J
根据能量守恒定律：E= ΔEp=2028600J
答：略.
9.You’re using a wedge to split a log.You are hitting the wedge with a large hammer to drive it into the log.It takes a force of 3100 N to push the wedge into the wood.If the wedge moves 0.2 m into the log,how much work have you done on the wedge?
已知：F=3100N,S=0.2m
求：W=?
由公式W=FS有,W=FS=3100 × 0 .2=620J
答：略.
10.You’re sanding a table.You must exert a force of 32 N on the sandpaper to keep it moving steadily across the table’s surface.You slide the paper back and forth for 21 minutes,during which time you move it 1000 m.How much work have you done?
已知：F=32N,t=21min=21× 60s=1260s,s=1000m,
求W=?
由公式W=FS有,W=FS=32× 1000=32000J
答：略.

1.Locomotive exert on a 12320-kg boxcar to make it accelerate forward at 0.57 m/s2.How long will it take the boxcar to reach its cruising speed of 82 km/h (51.0 mph or 22.8 m/s)?2.The builders of the pyramids used a long ramp to lift 22000-kg (22-ton THE GREAT LOCOMOTIVE CHASE怎么样 Today i will exert myself It will exert a profound influence upon ... have/exert an influence 求词组解释和例句 alive Because of you,I will exert myself是什么意思 帮我翻译下这句英文,：exert to find the target 英语翻译Following up on the reports you issued based on complaints received from your customer of locomotive workshops,ACKE Electric has set up a series of actions with the scope of:1.Impose controls during of the different phase of the coil wind They wanted Stephenson to build a locomotive to pull the coal cars from the mines. the railway locomotive wasnt the great invention of them 是 什 么 意 思 how many coaches can that locomotive pull 句子成分如何分析呢?that在这里是什么词性呢?谢啦～ If one does not exert oneself in youth ,one will regret it in old ageIf one does not exert oneself in youth ,one will regret it in old 英语翻译1.a scuba diver dives to a depth of 20m in ocean water.if the circular glass plate on the diver's face mask has a diameter of 16cm,what force does the water exert on it?2.a bathyscaph descends to a depth of 11000m(nearly 7 miles!)in the M what positive influence did the Greek culture exert on the world civilization? 1 exert further upward2 For some strains3 To date4 consumer preference is oriented to pork. sam and his brother eat a lot of vegetables exert day.(改为否定句） 英语翻译如题,结合下面的语境We would like to invite you to participate in field meetings of locomotive supply project in China. What kind of influence do you think may culture exert on our life?关于跨文化交际方面的