Question

In: Physics

#1= A train reaches a velocity of 40 m/s in 10 seconds from rest. Its acceleration...

#1= A train reaches a velocity of 40 m/s in 10 seconds from rest. Its acceleration is?

#2= If the distance between the Earth and the Sun decreases, the gravitational force between them will?

#3=A 0.4 kg baseball has a velocity of 20 m/s. Its kinetic energy is?

#4=A rock has a volume of 0.18 m3. If it is totally immersed into water, what’s the buoyant force it will experience? ( density(water)=1000 kg/m3,   g=10m/s2 )

#5=A box has a weight of 1000 N and is placed over a table. If the contact area is 2 m2, the pressure exerting on the table is?

#6=Which of the following is NOT a force? mass, friction, weight,, tension?

#7=Two masses are attracted by a gravitational force of 0.27 N. What will the force of attraction be if the distance between the two masses is tripled?

#8=A horse runs 1800 m in a time of 2 minutes. What’s its average speed?

#9=Any two masses attract each other. Which law is this?

#10=A 0.4 kg baseball has a velocity of 20 m/s. Its momentum is?

#11=A rock with a mass of 2 kg is placed at top of a hill that is 200 m high. Taking g = 10 m/s2, its gravitational potential energy is?

#12=The accepted value of acceleration due to gravity is 9.8 m/s. You have measured its experimental value to be 9.2 m/s. The % error is?

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Expert Solution

genius_generous answered 2 years ago
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