Various tasks from the New Era dynamics. Generator. Test
1 The diagram shows two forces acting on a body. The resultant force is:
A. greater than 7 N.
B. less than 7 N.
C. equal to 7 N.
2 Which dynamometer indicates the greater force? Select the correct answer. The greater force is indicated by dynamometer A/B.
3 Staś and Zosia are pushing a wardrobe horizontally to the right. Staś applies a force of 300 N, and Zosia applies a force of 200 N. The directions of both forces are the same. Calculate the resultant force acting on the wardrobe. Record your calculations. Ignore the force of friction.
4 Calculate the weight of an 80 kg person. Record your calculations. Assume g = 10 m/s2.
5 A certain force, acting on a 5 kg ball, gives it an acceleration of 2 m/s2. Calculate the value of this force. Record your calculations.
6 Calculate the force acting on a 30 kg body for which the velocity-time graph is shown.
7 Calculate the acceleration of a 2 kg body under the influence of the two forces shown in the diagram.
8 Car A, with a mass of 1000 kg, accelerates at 2.3 m/s², and car B, with a mass of 1200 kg, accelerates at 1.8 m/s². Which car experiences the greater net force?
9 A 2 kg block is acted upon by a constant net force of 10 N. Calculate the block's acceleration. Record the calculations.
10 A locomotive is used to move three wagons sequentially on a railway siding. The locomotive exerted the same force on each wagon, but each wagon experienced a different acceleration. Which wagon had the greatest mass? A. Car A: a = 2 m/s
2 B. Car B: a = 0.75 m/s
2 C. Car C: a = 1 m/s2
11 The graph shows the dependence of the velocity of a toy car on time when a force of 6 N is applied to the car. Calculate the mass of the toy. Record the calculations.
12 A car with a mass of 1 t starts moving and travels a distance of 400 m in the first 20 s of its motion.
Calculate the resultant force acting on the car. Record the calculations. Assume that the car's motion is uniformly accelerated.
13 Complete the sentences with the appropriate phrases.
If two forces of the same magnitude act on a body and the body remains at rest,
then these forces have A/B directions. If the same forces act on two bodies of different masses,
then C/D the body with the smaller mass will accelerate.
A. the same B. opposite C. greater D. less
14 Complete the problem with the appropriate phrases. If an unbalanced force acts on a body, it moves with a motion A/B, meaning that
C/D changes by the same amount in successive, equal time intervals.
A. uniformly variable B. uniformly rectilinear C. velocity D. acceleration
15 An 82 kg worker lifts a load of bricks on a rope suspended from a pulley.
What is the maximum force he can exert?
A. 8.2 N B. 82 N C. 820 N D. 8200 N
16 Mark T if the statement is true or F if it is false.
1. Mass is a measure of a body's inertia. P F
2. The time it takes a body to fall freely depends on its mass. P F
3. 1 N is the value of the net force that gives a body with a mass of 1 kg an acceleration of 1 m/s². P F
17 The graph shows the relationship between velocity and time for a motorcyclist traveling in a straight line on a certain section of the highway. Complete the sentence. The motorcyclist's motion is described by A/ B/ C.
A. Newton's First Law of Motion
B. Newton's Second Law of Motion
C. Newton's Third Law of Motion
18 Some goods are delivered to stores on pallets. With what force does the pallet support a 220 kg item?
A. 2200 N B. 22 N C. 22 kN D. 200 N
19 Jacek and Kamil, standing on skateboards, are pulling a rope. Jacek has a mass of 50 kg, and Kamil has a mass of 60 kg. Jacek pulls Kamil with a force of 100 N. With what force does Kamil pull Jacek?
A. 50 N
B. 100 N
C. 200 N
20 In many places in Poland, there is a custom of banging two Easter eggs together. If
Oli's Easter egg hit Asia's Easter egg with a force of 3 N, then Asia's Easter egg hit Ola's Easter egg with a force of:
A. 15 N B. 1.5 N C. 0.15 N D. 3 N