3. A rocket has a mass of 1.00 x 105 kg. Its engines develop a thrust of 2.50 x 106 N, what is the acceleration of the rocket? 4. A car is travelling on a level highway at a speed of 15 m/s. A breaking force of 3,000 N brings the car to a stop in 10 s. What is the mass of the car? Find the force needed to accelerate a 50 kg crate up a 30.0° incline at a rate of 1.2 m/s². 1 of

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6:50 PM Wed Apr 5
<
=
☹ AA
UI
3.
A rocket has a mass of 1.00 x 105 kg. Its engines develop a thrust of 2.50 x 106 N,
what is the acceleration of the rocket?
4.
A car is travelling on a level highway at a speed of 15 m/s. A breaking force of
3,000 N brings the car to a stop in 10 s. What is the mass of the car?
G
5. Find the force needed to accelerate a 50 kg crate up a 30.0° incline at a rate of 1.2
m/s².
6. A 1200 kg elevator is lowered at a constant velocity. Find the tension in the
cable.
7. Two 4.0 kg masses are pulled by 2.5 kg mass on a horizontal air track. What is
the acceleration of the system? Find the tension between the two 4.0 kg masses.
8. Two forces pull a 7.00 kg object: 20.5 N East and 32.0 N 67.5° South of East. Find
the force needed to keep the object stationary.
1.2m /12
Fnet =ma_boN
Fapp
aut
kg
P20 Unit B Review
√30°
F₁₂=m-a=√
37%
a n
1 of 3
Transcribed Image Text:6:50 PM Wed Apr 5 < = ☹ AA UI 3. A rocket has a mass of 1.00 x 105 kg. Its engines develop a thrust of 2.50 x 106 N, what is the acceleration of the rocket? 4. A car is travelling on a level highway at a speed of 15 m/s. A breaking force of 3,000 N brings the car to a stop in 10 s. What is the mass of the car? G 5. Find the force needed to accelerate a 50 kg crate up a 30.0° incline at a rate of 1.2 m/s². 6. A 1200 kg elevator is lowered at a constant velocity. Find the tension in the cable. 7. Two 4.0 kg masses are pulled by 2.5 kg mass on a horizontal air track. What is the acceleration of the system? Find the tension between the two 4.0 kg masses. 8. Two forces pull a 7.00 kg object: 20.5 N East and 32.0 N 67.5° South of East. Find the force needed to keep the object stationary. 1.2m /12 Fnet =ma_boN Fapp aut kg P20 Unit B Review √30° F₁₂=m-a=√ 37% a n 1 of 3
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